Sunday, September 13, 2015

Cloud And Song

Here's a composition of mine I just finished.  I've had the video for quite a while but didn't know what to do with it until now.  Sorry for the poor image quality.  Better cameras require dollars that I don't wish to accumulate too much of.

https://www.youtube.com/watch?v=6XYQuWP0lhU

Thursday, September 10, 2015

Jupiter Today | 11 September 2015 | Eastern Elongations

Hello!  Today all four Galilean moons are at or near their eastern elongations.

JUPITER TODAY is a daily blog about the dynamic Jupiter system for the purpose of monitoring activity.

We start with the overall view of activity with the Jupiter system, showing the orbits of the four Galilean moons:



This is a view of the Jupiter system looking down on it.  Following the blue line to the left is the line of sight to Earth, while following the gray line to the left is the line of sight to the Sun.  The orbits of the four Galilean moons are shown.  The large dots indicate the position of each moon at 0h, 6h, 12h, 18h, and 24h (0h the next day) UTC for this date.  From this point of view, the moons revolve around Jupiter in a counter-clockwise motion.  For more information about this graphic, see the post from 30 July 2015.

Orbital Motion

The graph below shows the positions of the four Galilean moons over the next 24 hours as seen from Earth.  The curved lines show the path of each moon through time.  The dark band in the center is Jupiter.  The x-axis is the distance, in arc seconds, from the center of Jupiter:

At 0h UTC, Callisto starts the day in quad 1 moving east.  Ganymede spends all day in quad 2 moving west.  Europa begins the day in quad 1 heading east.  Io starts the day in quad 2 moving west.

By 6h UTC, Io is about to begin its transit of Jupiter.

At 12h UTC, Europa is just past its eastern elongation and is now in quad 2 moving west.  Callisto is also at its eastern elongation and is joining Europa and Ganymede in quad 2 headed west.

By 18h UTC, Io is at western elongation and is moving into quad 4 heading east.

By 0h UTC tomorrow, Io is firmly in quad 4 moving east.  Europa, Ganymede, and Callisto are all in quad 2 moving west.

Apojoves and Perijoves

At 04:49 UTC, Io goes through an apojove at a distance of 423,499.1 km from Jupiter.

Relative Positions and Motions

At 0h UTC, the position of Jupiter is RA 10h 33m 59.5s, DEC +09d 59m 13.9s.  The phase angle is 2.110 degrees, which is 0.138 degrees greater than yesterday.  The angle between Jupiter and the Sun is 11.368 degrees, which is 0.754 degrees greater than yesterday.  The distance between Jupiter and the Sun is 806,595,126.1 km, which is 35,663.8 km further away than yesterday.  Jupiter is moving away from the Sun at a velocity of 1,485.99 km/h, which is 0.6 km/h faster than yesterday.  Earth is 953,725,530.6 km from Jupiter, which is 449,006.2 km closer than yesterday.  Earth is moving towards Jupiter at a velocity of 18,700.59 km/h, which is 1,293.26 km/h faster than yesterday.  We continue to accelerate towards Jupiter.  What force are we feeling from F=ma???????

Jupiter-Satellite Events

From 06:44 to 09:02 UTC, the shadow of Io transits Jupiter.  From 06:59 to 09:17 UTC, Io transits Jupiter.

Glorious Orbital Ribbons

These are the spacial and temporal connections between the four Galilean moons.  This is, once again, looking down upon the Jupiter system.



When is the first image of Jupiter after Superior Conjunction going to be taken?  If you have one, send it to me!

Spread the word about this daily blog!  This blog is subject to evolution.  What can I do to make this blog more interesting and more informative?

Subscribe at the right column of this blog and get these posts sent to you automatically!

Please send me your feedback, comments, and questions to jupitertoday AT gmail DOT com or the comments section of this blog.

With my gratitude, the data used to create the orbit plots and ribbons was supplied by the JPL Horizons website.  The graphics showing the location of the four moons as seen from Earth are via 'Jupiter Viewer 2.8'.  Jupiter-Satellite and Satellite mutual events data is supplied from IMCEE.

Until tomorrow, I bid you Peace.    

Wednesday, September 9, 2015

Tao Teh Ching 43

Here's the one I "randomly" chose today:

The softest of all things
Overrides the hardest of all things.
Only Nothing can enter into non-space
Hence I know the advantages of Non-Ado.

Few things under heaven are as instructive as the lessons of Silence,
Or as beneficial as the fruits of Non-Ado.

Jupiter Today | 10 September 2015 | All End East

Hello!  At the end of today, all four Galilean moons are east of Jupiter.  A great sight to see, for sure!

JUPITER TODAY is a daily blog about the dynamic Jupiter system for the purpose of monitoring activity.

We start with the overall view of activity with the Jupiter system, showing the orbits of the four Galilean moons:



This is a view of the Jupiter system looking down on it.  Following the blue line to the left is the line of sight to Earth, while following the gray line to the left is the line of sight to the Sun.  The orbits of the four Galilean moons are shown.  The large dots indicate the position of each moon at 0h, 6h, 12h, 18h, and 24h (0h the next day) UTC for this date.  From this point of view, the moons revolve around Jupiter in a counter-clockwise motion.  For more information about this graphic, see the post from 30 July 2015.

Orbital Motion

The graph below shows the positions of the four Galilean moons over the next 24 hours as seen from Earth.  The curved lines show the path of each moon through time.  The dark band in the center is Jupiter.  The x-axis is the distance, in arc seconds, from the center of Jupiter:

At 0h UTC, Io begins the day at western elongation and will be moving into quad 4 headed east.  Europa starts the day in quad 4 moving east pretty near Io from Earth's POV.  Ganymede spends most of the day in quad 1 moving east.  Callisto is in quad 1 moving east one more day.

At 6h UTC, Io is now firmly in quad 4 headed east.

By 12h UTC, Io and Europa are moving behind Jupiter.

By 18h UTC, Io and Europa are now firmly in quad 1 moving east.  Ganymede is at eastern elongation and will be moving into quad 2 headed west.

At 0h UTC tomorrow, Io has gone through eastern elongation and is now in quad 2 headed west.  Europa continues in quad 1 moving east for another half-day.  Ganymede is now firmly in quad 2 moving west.  Callisto spends its last full day in quad 1 moving east.

Apojoves and Perijoves

At 07:42 UTC, Io goes through a perijove (closest it will be to Jupiter this orbit) at a distance of 420,046.8 km.  At 08:05 UTC, on the same side of the planet Europa goes through an apojove (furthest it will be to Jupiter this orbit) at a distance of 677,643.9 km.  Europa is 1.613 times further away from Jupiter than Io.

Relative Positions and Motions

At 0h UTC, the position of Jupiter is RA 10h 33m 10.6s, DEC +10d 03m 56.4s.  The phase angle continues to widen and today it's 1.972 degrees, which is 0.138 degrees greater than yesterday.  Jupiter also continues to move away from the Sun at an angular separation of 10.614 degrees, which is 0.753 degrees greater than yesterday.  The distance between Jupiter and Earth is 954,174,536.8 km, which is 417,968 km closer than yesterday.  Jupiter and Earth are moving toward one another at a velocity of 17,415.33 km/h (similar to low Earth orbiting satellites) ad this is 1.294.1 km/h faster than yesterday.  Jupiter is 806,559,462.3 km from the Sun, which is 35,649.4 km further away than yesterday.  Jupiter and the Sun are moving apart at a velocity of 1,485.39 km/h, which is 0.26 km/h faster than yesterday.

Jupiter-Satellite Events

From 09:27 to 11:59 UTC, Io moves behind Jupiter.  From 12:14 to 15:38 UTC, Europa moves behind Jupiter.

Orbital Ribbons

These are the spacial and temporal connections between the four Galilean moons.  This is, once again, looking down upon the Jupiter system.



When is the first image of Jupiter after Superior Conjunction going to be taken?  If you have one, send it to me!

Spread the word about this daily blog!  This blog is subject to evolution.  What can I do to make this blog more interesting and more informative?

Subscribe at the right column of this blog and get these posts sent to you automatically!

Please send me your feedback, comments, and questions to jupitertoday AT gmail DOT com or the comments section of this blog.

With my gratitude, the data used to create the orbit plots and ribbons was supplied by the JPL Horizons website.  The graphics showing the location of the four moons as seen from Earth are via 'Jupiter Viewer 2.8'.  Jupiter-Satellite and Satellite mutual events data is supplied from IMCEE.

Until tomorrow, I bid you Peace.   

Tuesday, September 8, 2015

Jupiter Today | 09 September 2015 | Motion

Hello!  Everything is in motion!  Why is that?

JUPITER TODAY is a daily blog about the dynamic Jupiter system for the purpose of monitoring activity.

We start with the overall view of activity with the Jupiter system, showing the orbits of the four Galilean moons:



This is a view of the Jupiter system looking down on it.  Following the blue line to the left is the line of sight to Earth, while following the gray line to the left is the line of sight to the Sun.  The orbits of the four Galilean moons are shown.  The large dots indicate the position of each moon at 0h, 6h, 12h, 18h, and 24h (0h the next day) UTC for this date.  From this point of view, the moons revolve around Jupiter in a counter-clockwise motion.  For more information about this graphic, see the post from 30 July 2015.

Orbital Motion

The graph below shows the positions of the four Galilean moons over the next 24 hours as seen from Earth.  The curved lines show the path of each moon through time.  The dark band in the center is Jupiter.  The x-axis is the distance, in arc seconds, from the center of Jupiter:

At 0h UTC, Io starts the day in quad 1 near eastern elongation.  Europa begins the day in quad 3 moving west.  Ganymede begins the day moving behind Jupiter and is moving into quad 1 headed east the rest of the day.  Callisto spends all day, once again, in quad 1 moving east.

By 6h UTC, Io is firmly in quad 2 moving west.  Ganymede is now firmly in quad 1 moving east.

At 12h UTC, Io is about to begin its transit of Jupiter.  Europa is near its western elongation and will be moving into quad 4 headed east.

At 18h UTC, Io is firmly in quad 3 moving west.  Europa is past western elongation and is now in quad 4 moving east.

By 0h UTC tomorow, Io is at western elongation.  Europa continues moving east in quad 4.  Ganymede and Callisto are both east of Jupiter in quad 1.

Apojoves and Perijoves

At 10:32 UTC, Io goes through a apojove at a distance of 423,490.9 km.

Relative Positions and Motions

At 0h UTC, the position of Jupiter is RA 10h 32m 21.6s, DEC +10d 08m 38.9s.  The phase angle is 1.834 degrees, which is 0.138 degrees greater than yesterday.  The angle between Jupiter and the Sun as seen from Earth is 9.861 degrees, which is 0.751 degrees greater than yesterday.  The distance between Jupiter and the Sun is 806,523,812.9 km, which is 35,643.2 km greater than yesterday.  Jupiter is moving away from the Sun at a velocity of 1,485.13 km/h, which is 2.78 km/h slower than yesterday.  Jupiter is 954,592,504.8km from Earth, which is 386,909.4 km closer than yesterday.  Jupiter and Earth are moving  toward one another at a velocity of 16,121.23 km/h, which is 1.297.65 km/h faster than yesterday.  Whoosh!

Jupiter-Satellite Events

From 12:16 to 14:33 UTC, the shadow of Io transits Jupiter.  From 12:29 to 14:47 UTC, Io itself transits Jupiter.

Glorious Orbital Ribbons

These are the spacial and temporal connections between the four Galilean moons.  This is, once again, looking down upon the Jupiter system.



When is the first image of Jupiter after Superior Conjunction going to be taken?  If you have one, send it to me!

Spread the word about this daily blog!  This blog is subject to evolution.  What can I do to make this blog more interesting and more informative?

Subscribe at the right column of this blog and get these posts sent to you automatically!

Please send me your feedback, comments, and questions to jupitertoday AT gmail DOT com or the comments section of this blog.

With my gratitude, the data used to create the orbit plots and ribbons was supplied by the JPL Horizons website.  The graphics showing the location of the four moons as seen from Earth are via 'Jupiter Viewer 2.8'.  Jupiter-Satellite and Satellite mutual events data is supplied from IMCEE.

Until tomorrow, I bid you Peace.  

Monday, September 7, 2015

Jupiter Today | 08 September 2015 | Apojoves and Perijoves

Hello!  Today, there are two apojoves and two perijoves.  An apojove is when a moon of Jupiter is furthest away, and a perijove is when it's closest.  In a 24 hour time period, we oftentimes see Io go through both an apojove and a perijove.  An interesting observation I've made is that the position of Io's apojove is almost directly on the opposite side of the planet from Europa's apojove, and of course this goes for their perijoves also.  This also means that Io's apojove and Europa's perijove are on the same side of the planet.  In any case, it's a very very cool resonance and I wonder what effects are being felt by these two moons and how does this resonance effect the other moons and Jupiter itself?  Curious.....

JUPITER TODAY is a daily blog about the dynamic Jupiter system for the purpose of monitoring activity.

We start with the overall view of activity with the Jupiter system, showing the orbits of the four Galilean moons:



This is a view of the Jupiter system looking down on it.  Following the blue line to the left is the line of sight to Earth, while following the gray line to the left is the line of sight to the Sun.  The orbits of the four Galilean moons are shown.  The large dots indicate the position of each moon at 0h, 6h, 12h, 18h, and 24h (0h the next day) UTC for this date.  From this point of view, the moons revolve around Jupiter in a counter-clockwise motion.  For more information about this graphic, see the post from 30 July 2015.

Jupiter has moved out of the field of view of SOHO, so no more SOHO images until next superior conjunction.  Booooooooooooo!

Orbital Motion

The graph below shows the positions of the four Galilean moons over the next 24 hours as seen from Earth.  The curved lines show the path of each moon through time.  The dark band in the center is Jupiter.  The x-axis is the distance, in arc seconds, from the center of Jupiter:

At 0h UTC, Io starts the day firmly in quad 3 moving west.  Europa is just past eastern elongation and is now in quad 2 moving west.  Ganymede spends all day in quad 4 moving east and only at the end of the day does it move behind Jupiter.  Callisto spends all day in quad 1 headed east.

By 6h UTC, Io is just past western elongation and is now in quad 4 moving east.

By 12h UTC, Io is now firmly in quad 4 moving east.  Europa continues in quad 2 headed west.

At 18h UTC, Io has moved behind Jupiter and is now in quad 1 moving east.  Europa is transiting Jupiter and will be moving into quad 3 headed west.

By 0h UTC tomorrow, Io is in quad 1 moving east.  Europa is past transit and firmly in quad 3 moving west.  Ganymede is moving behind Jupiter.  Callisto continues in quad 1 moving east.

Apojoves and Perijoves

At 13:13 UTC, Ganymede goes through an apojove at a distance of 1,071,813.3 km.  At 13:25 UTC, Io goes through a perijove at a distance of 420,040.3 km.  At 13:42 UTC, Europa goes through a perijove at a distance of 664,522.2 km.  At 17:43 UTC, Callisto goes through an apojove at a distance of 1,896,585.1 km.

Relative Positions and Motions

At 0h UTC, the position of Jupiter on Earth's celestial sphere is RA 10h 31m 32.5s, DEC +10d 13m 21.4s.  The phase angle is 1.696 degrees, which is 0.138 degrees greater than yesterday.  The angular separation between Jupiter and the Sun as seen from Earth is 9.110 degrees, which is 0.751 degrees greater than yesterday.  The distance between Jupiter and the Sun is 806,488,169.7 km, which is 35,709.7 km greater than yesterday.  This means that Jupiter and the Sun are moving away from one another at a velocity of 1,487.9 km/h.  The distance between Jupiter and Earth is 954,979,414.2 km, which is 355,765.9 km closer than yesterday.  Jupiter and Earth are moving towards each other at a velocity of 14,823.6 km/h.  Wow.

Jupiter-Satellite Events

From 14:59 to 19:29 UTC, Io moves behind Jupiter.  From 17:25 to 20:16 UTC, Europa's shadow transits Jupiter.  From 17:50 to 20:41 UTC, Europa transits Jupiter.  From 22:49 to 03:18 UTC tomorrow, Ganymede moves behind Jupiter.

Glorious Orbital Ribbons

These are the spacial and temporal connections between the four Galilean moons.  Notice the I-E-G symmetry.  This is, once again, looking down upon the Jupiter system.



When is the first image of Jupiter after Superior Conjunction going to be taken?  If you have one, send it to me!

Spread the word about this daily blog!  This blog is subject to evolution.  What can I do to make this blog more interesting and more informative?

Subscribe at the right column of this blog and get these posts sent to you automatically!

Please send me your feedback, comments, and questions to jupitertoday AT gmail DOT com or the comments section of this blog.

With my gratitude, the data used to create the orbit plots and ribbons was supplied by the JPL Horizons website.  The graphics showing the location of the four moons as seen from Earth are via 'Jupiter Viewer 2.8'.  Jupiter-Satellite and Satellite mutual events data is supplied from IMCEE.

Until tomorrow, I bid you Peace.  

Sunday, September 6, 2015

Jupiter Today | 07 September 2015 | Callisto Behind

Hello!  I had some internet problems the past couple of days due to a wonderful bolt of lightening that zapped my modem.  I had my headphones on at the time of the bolt so I actually heard the frying of the modem.  It was great.

JUPITER TODAY is a daily blog about the dynamic Jupiter system for the purpose of monitoring activity.

We start with the overall view of activity with the Jupiter system, showing the orbits of the four Galilean moons:



This is a view of the Jupiter system looking down on it.  Following the blue line to the left is the line of sight to Earth, while following the gray line to the left is the line of sight to the Sun.  The orbits of the four Galilean moons are shown.  The large dots indicate the position of each moon at 0h, 6h, 12h, 18h, and 24h (0h the next day) UTC for this date.  From this point of view, the moons revolve around Jupiter in a counter-clockwise motion.  For more information about this graphic, see the post from 30 July 2015.

Jupiter has moved out of the field of view of SOHO, so no more SOHO images until next superior conjunction.  Booooooooooooo!

Orbital Motion

The graph below shows the positions of the four Galilean moons over the next 24 hours as seen from Earth.  The curved lines show the path of each moon through time.  The dark band in the center is Jupiter.  The x-axis is the distance, in arc seconds, from the center of Jupiter:


At 0h UTC, Io begins the day firmly in quad 1 moving east.  Europa is moving behind Jupiter and will be going into quad 1 headed east.  Ganymede starts the day in quad 3 moving west and very near western elongation.  Callisto is in quad 4 moving east.

By 6h UTC, Io is near its eastern elongation.  Europa is firmly in quad 1 moving east.  Ganymede is at western elongation.  Callisto is moving behind Jupiter.

At 12h UTC, Io is firmly in quad 2 moving west.  Callisto is now firmly in quad 1 moving east.

By 18h UTC, Io is about to begin its transit of Juptier and Europa is near its eastern elongation.

At 0h UTC tomorrow, Io is firmly in quad 3 moving west.  Europa is at eastern elongation and will be moving into quad 2 headed west.  Ganymede is firmly in quad 4 moving east.  Callisto is now established in quad 1 moving east for the next couple of days.

Apojoves and Perijoves

At 16:12 UTC, Io goes through an apojove at a distance of 423,490.3 km.

Relative Positions and Motions

At 0h UTC, Jupiter is at an RA of 10h 30m 43.3s and DEC +10d 18m 03.9s.  The phase angle is 1.558 degrees, which is 0.139 degrees greater than yesterday.  The angular separation between Jupiter and the Sun as seen from Earth is 8.359 degrees, which is 0.749 degrees greater than yesterday.  The distance between the Sun and Jupiter is 806,452,460.010 km.  The distance between Jupiter and Earth is 955,335,180.081 km.  These distances are now calculated using the JPL Horizons data instead of my previous source.  Not sure why they're different (by a few hundred kilometers) so that's something I'll have to look into a little more to see which one is "correct".

Jupiter-Satellite Events

At 02:35 UTC, Europa reappears from behind Jupiter.  From 04:39 to 07:12 UTC, Io moves behind Jupiter.

Glorious Orbital Ribbons

These are the spacial and temporal connections between the four Galilean moons.  This is, once again, looking down upon the Jupiter system.



When is the first image of Jupiter after Superior Conjunction going to be taken?  If you have one, send it to me!

Spread the word about this daily blog!  This blog is subject to evolution.  What can I do to make this blog more interesting and more informative?

Subscribe at the right column of this blog and get these posts sent to you automatically!

Please send me your feedback, comments, and questions to jupitertoday AT gmail DOT com or the comments section of this blog.

With my gratitude, the data used to create the orbit plots and ribbons was supplied by the JPL Horizons website.  The graphics showing the location of the four moons as seen from Earth are via 'Jupiter Viewer 2.8'.  Jupiter-Satellite and Satellite mutual events data is supplied from IMCEE.

Until tomorrow, I bid you Peace.  

Wednesday, September 2, 2015

Jupiter Today | 03 September 2015 | Behind Jupiter

Hello!

JUPITER TODAY is a daily blog about the dynamic Jupiter system for the purpose of monitoring activity.

We start with the overall view of activity with the Jupiter system, showing the orbits of the four Galilean moons:



This is a view of the Jupiter system looking down on it.  Following the blue line to the left is the line of sight to Earth, while following the gray line to the left is the line of sight to the Sun.  The orbits of the four Galilean moons are shown.  The large dots indicate the position of each moon at 0h, 6h, 12h, 18h, and 24h (0h the next day) UTC for this date.  From this point of view, the moons revolve around Jupiter in a counter-clockwise motion.  For more information about this graphic, see the post from 30 July 2015.

Jupiter has just now passed Superior Conjunction.  These images blow me away they are so incredibly beautiful.  Here's the current SOHO image showing the steady progress of Jupiter across its field of view:



Orbital Motion

The graph below shows the positions of the four Galilean moons over the next 24 hours as seen from Earth.  The curved lines show the path of each moon through time.  The dark band in the center is Jupiter.  The x-axis is the distance, in arc seconds, from the center of Jupiter:


At 0h UTC, Io begins the day just past western elongation and in quad 4 moving east.  Europa starts the day in quad 4 moving east also.  Io and Europa will be moving together all day today, including behind Jupiter.  Ganymede starts the day in quad 1 moving east.  Callisto is passing through western elongation and will be in quad 4 headed east.

At 6h UTC, Io is in quad 4 moving behind Jupiter soon.  Callisto is now firmly in quad 4 moving east the rest of the day.

By 12h UTC, Io has moved behind Jupiter and is now in quad 1 moving east.  Europa is moving behind Jupiter.  Ganymede is near eastern elongation and will be moving into quad 2 headed west.

At 18h UTC, Io is near eastern elongation and will be headed into quad 2 moving west.

By 0h UTC tomorrow, Io is firmly in quad 2 moving west.  Europa is in quad 1 headed east.  Ganymede is now firmly in quad 2 moving west.  Callisto continues in quad 4 headed east.

Apojove and Perijoves

At 06:31 UTC, Io goes through a perijove at a distance of 420,046.9 km.  At 06:47 UTC, Europa goes through an apojove at a distance of 677,654.5 km.

Relative Positions and Motions

At 0h UTC, Jupiter is at an RA of 10h 27m 26,1s, DEC +10d 36m 53.1s.  The phase angle is 1.005 degrees, which is 0.138 degrees greater than yesterday.  The angular separation between Jupiter and the Sun as seen from Earth is 5.376 degrees, which is 0.739 degrees greater than yesterday.  The distance between Jupiter and the Sun is 806,308,899 km, which is 35,976 km further away than yesterday.  Jupiter is moving away from the Sun at a velocity of 1,499.0 km/h, which is 1.167 km/h slower than yesterday.  Jupiter and Earth are 956,447,099 km apart, which is 200,488 km further apart than yesterday.  Jupiter and Earth are moving towards one another at a velocity of 8,353.667 km/h, which is 1,287.709 km/h faster than yesterday.  Do you feel the acceleration??????

Jupiter-Satellite Events

From 07:33 to 09:58 UTC, Io moves behind Jupiter.  From 09:37 to 12:47 UTC, Europa moves behind Jupiter.

Glorious Orbital Ribbons

These are the spacial and temporal connections between the four Galilean moons.  This is, once again, looking down upon the Jupiter system.



Jupiter is so near Superior Conjunction that photography and other data collection isn't practical.  We'll have to wait about a months after SC to start viewing the Jupiter system again.

Spread the word about this daily blog!  This blog is subject to evolution.  What can I do to make this blog more interesting and more informative?

Subscribe at the right column of this blog and get these posts sent to you automatically!

Please send me your feedback, comments, and questions to jupitertoday AT gmail DOT com or the comments section of this blog.

With my gratitude, the data used to create the orbit plots and ribbons was supplied by the JPL Horizons website.  The graphics showing the location of the four moons as seen from Earth are via 'Jupiter Viewer 2.8'.  Jupiter-Satellite and Satellite mutual events data is supplied from IMCEE.

Until tomorrow, I bid you Peace. 

Tuesday, September 1, 2015

Jupiter Today | 02 September 2015 | Callisto West

Hello!

JUPITER TODAY is a daily blog about the dynamic Jupiter system for the purpose of monitoring activity.

We start with the overall view of activity with the Jupiter system, showing the orbits of the four Galilean moons:


This is a view of the Jupiter system looking down on it.  Following the blue line to the left is the line of sight to Earth, while following the gray line to the left is the line of sight to the Sun.  The orbits of the four Galilean moons are shown.  The large dots indicate the position of each moon at 0h, 6h, 12h, 18h, and 24h (0h the next day) UTC for this date.  From this point of view, the moons revolve around Jupiter in a counter-clockwise motion.  For more information about this graphic, see the post from 30 July 2015.

Jupiter has just now passed Superior Conjunction.  These images blow me away they are so incredibly beautiful.  Here's the current SOHO image showing the steady progress of Jupiter across its field of view:

The graph below shows the positions of the four Galilean moons over the next 24 hours as seen from Earth.  The curved lines show the path of each moon through time.  The dark band in the center is Jupiter.  The x-axis is the distance, in arc seconds, from the center of Jupiter:


Orbital Motion

At 0h UTC, Io begins the day at its eastern elongation and will be in quad 2 moving west.  Europa starts today firmly in quad 3 headed west.  Ganymede spends all day in quad 1 moving east.  Callisto will be in quad 3 moving west one more day.

At 6h UTC, Io is firmly in quad 2 moving west.

By 12h UTC, Io is transiting Jupiter and moving into quad 3 headed west.  Europa is at its western elongation and is headed into quad 4 moving east.

At 18h UTC, Io is firmly in quad 3 headed west.  Europa is now firmly in quad 4 moving east.

By 0h UTC tomorrow, Io has just passed its western elongation.  Europa is still in quad 4 moving east.  Ganymede ends the day moving east in quad 1.  Callisto is very near its western elongation.

Apojoves and Perijoves

At 09:18 UTC, Io goes through an apojove at a distance of 423,491.0 km.

Relative Positions and Motions

At 0h UTC, the position of Jupiter is RA 10h 26m 36.6s, DEC +10d 41m 35.1s.  The phase angle is 0.867 degrees, which is 0.137 degrees greater than yesterday.  The angular separation between Jupiter and the Sun is 4.637 degrees, which is 0.734 degrees greater than yesterday.  The distance between Jupiter and the Sun is 806,272,923 km, which is 36,004 km further apart than yesterday.  Jupiter is moving away from the Sun at a velocity of 1,500.167 km/h, which is 3.166 km/h slower than yesterday.  The distance between Jupiter and Earth is 956,647,587 km, which is 169,583 km less than yesterday.  Earth and Jupiter are moving towards one another at a velocity of 7,065.958 km/h, which is 1,288.041 faster than yesterday.  We are accelerating towards Jupiter.  F = ma????

Jupiter-Satellite Events

From 10:21 to 12:39 UTC, Io's shadow transits Jupiter.  From 10:28 to 12:46 UTC, Io transits Jupiter.

Orbital Ribbons

These are the spacial and temporal connections between the four Galilean moons.  This is once again looking down upon the Jupiter system.

Jupiter is so near Superior Conjunction that photography and other data collection isn't practical.  We'll have to wait about a months after SC to start viewing the Jupiter system again.

Spread the word about this daily blog!  This blog is subject to evolution.  What can I do to make this blog more interesting and more informative?

Subscribe at the right column of this blog and get these posts sent to you automatically!

Please send me your feedback, comments, and questions to jupitertoday AT gmail DOT com or the comments section of this blog.

With my gratitude, the data used to create the orbit plots and ribbons was supplied by the JPL Horizons website.  The graphics showing the location of the four moons as seen from Earth are via 'Jupiter Viewer 2.8'.  Jupiter-Satellite and Satellite mutual events data is supplied from IMCEE.

Until tomorrow, I bid you Peace.