Jupiter Today | 21 May 2017

Distances:

At 0 hours UTC, Jupiter is 815970123.86 km from the Sun.
    6663.87 km closer to the Sun than yesterday
    Accelerating towards the Sun at a radial velocity of 277.66 km/h (1.35 km/h faster than yesterday)

At 0 hours UTC, Jupiter is 704114932.53 km from the Earth.
    1652885.80 km further from the Earth than yesterday
    Accelerating away from the Earth at a radial velocity of 68870.24 km/h (1248.02 km/h faster than yesterday)

Positions and Motion:

At 0.00 hours UTC, Io is in quadrant 4, 420013.01 km from Jupiter.
At 6.00 hours UTC, Io is in quadrant 4, 420675.38 km from Jupiter.
    ===> Maximum Western Elongation <===
At 12.00 hours UTC, Io is in quadrant 1, 422145.65 km from Jupiter.
At 18.00 hours UTC, Io is in quadrant 1, 423326.56 km from Jupiter.
At 24.00 hours UTC, Io is in quadrant 1, 423354.81 km from Jupiter.

At 0.00 hours UTC, Europa is in quadrant 2, 664956.51 km from Jupiter.
At 6.00 hours UTC, Europa is in quadrant 2, 665465.96 km from Jupiter.
At 12.00 hours UTC, Europa is in quadrant 2, 667070.72 km from Jupiter.
    ===> Maximum Eastern Elongation <===
At 18.00 hours UTC, Europa is in quadrant 2, 669451.63 km from Jupiter.
At 24.00 hours UTC, Europa is in quadrant 2, 672141.13 km from Jupiter.

At 0.00 hours UTC, Ganymede is in quadrant 4, 1069047.83 km from Jupiter.
At 6.00 hours UTC, Ganymede is in quadrant 4, 1069452.68 km from Jupiter.
At 12.00 hours UTC, Ganymede is in quadrant 4, 1069898.35 km from Jupiter.
At 18.00 hours UTC, Ganymede is in quadrant 4, 1070368.95 km from Jupiter.
At 24.00 hours UTC, Ganymede is in quadrant 4, 1070846.48 km from Jupiter.

At 0.00 hours UTC, Callisto is in quadrant 2, 1889558.94 km from Jupiter.
At 6.00 hours UTC, Callisto is in quadrant 2, 1888411.73 km from Jupiter.
At 12.00 hours UTC, Callisto is in quadrant 2, 1887223.41 km from Jupiter.
At 18.00 hours UTC, Callisto is in quadrant 2, 1885998.79 km from Jupiter.
At 24.00 hours UTC, Callisto is in quadrant 2, 1884739.96 km from Jupiter.

Io goes through an apojove at 21 hours 8 minutes UTC at a distance of 423509.54 km.
Europa goes through an perijove at 0 hours 27 minutes UTC at a distance of 664953.03 km.

Events:

Io Shadow Transit ends at 0 hours 33.0 minutes
Io Occultation disappears at 18 hours 39.0 minutes
Io Eclipse reappears at 21 hours 47.6 minutes



 

Earth direction along green line to the left

Sun direction along blue line to the left

Orbits as seen from above.  Moons orbit counter-clockwise.  Black dots represent location of respective moon at 0h, 6h, 12h, 18h, and 24h UTC.

Purple path: Io
Blue path: Europa
Yellow path: Ganymede
Red path: Callisto

Orbital Ribbons: These are the spacial and temporal connections between the four Jovian Moons.  Black dot indicates location of Jupiter

 

Jupiter Today | 20 May 2017

Distances:

At 0 hours UTC, Jupiter is 815976787.73 km from the Sun.
    6631.55 km closer to the Sun than yesterday
    Accelerating towards the Sun at a radial velocity of 276.31 km/h (6.58 km/h slower than yesterday)

At 0 hours UTC, Jupiter is 702462046.73 km from the Earth.
    1622938.52 km further from the Earth than yesterday
    Accelerating away from the Earth at a radial velocity of 67622.22 km/h (1266.40 km/h faster than yesterday)

Positions and Motion:

At 0.00 hours UTC, Io is in quadrant 1, 423361.55 km from Jupiter.
At 6.00 hours UTC, Io is in quadrant 2, 423317.77 km from Jupiter.
    ===> Maximum Eastern Elongation <===
At 12.00 hours UTC, Io is in quadrant 2, 422128.85 km from Jupiter.
At 18.00 hours UTC, Io is in quadrant 3, 420662.77 km from Jupiter.
At 24.00 hours UTC, Io is in quadrant 3, 420013.01 km from Jupiter.

At 0.00 hours UTC, Europa is in quadrant 1, 672527.48 km from Jupiter.
At 6.00 hours UTC, Europa is in quadrant 1, 669842.05 km from Jupiter.
At 12.00 hours UTC, Europa is in quadrant 1, 667387.49 km from Jupiter.
At 18.00 hours UTC, Europa is in quadrant 1, 665643.33 km from Jupiter.
At 24.00 hours UTC, Europa is in quadrant 1, 664956.51 km from Jupiter.

At 0.00 hours UTC, Ganymede is in quadrant 3, 1068186.68 km from Jupiter.
At 6.00 hours UTC, Ganymede is in quadrant 3, 1068253.87 km from Jupiter.
At 12.00 hours UTC, Ganymede is in quadrant 3, 1068429.22 km from Jupiter.
At 18.00 hours UTC, Ganymede is in quadrant 4, 1068700.00 km from Jupiter.
At 24.00 hours UTC, Ganymede is in quadrant 4, 1069047.83 km from Jupiter.

At 0.00 hours UTC, Callisto is in quadrant 2, 1893468.90 km from Jupiter.
At 6.00 hours UTC, Callisto is in quadrant 2, 1892623.75 km from Jupiter.
At 12.00 hours UTC, Callisto is in quadrant 2, 1891681.46 km from Jupiter.
At 18.00 hours UTC, Callisto is in quadrant 2, 1890654.23 km from Jupiter.
At 24.00 hours UTC, Callisto is in quadrant 2, 1889558.94 km from Jupiter.

Io goes through an apojove at 2 hours 48 minutes UTC at a distance of 423508.68 km.
Io goes through an perijove at 23 hours 58 minutes UTC at a distance of 420012.99 km.

Events:

Io Occultation disappears at 0 hours 12.0 minutes
Io Eclipse reappears at 3 hours 18.9 minutes
Io Transit begins at 21 hours 29.0 minutes
Io Shadow Transit begins at 22 hours 23.0 minutes
Io Transit ends at 23 hours 40.0 minutes
Europa Occultation disappears at 19 hours 15.0 minutes
Europa Eclipse reappears at 23 hours 28.4 minutes
Ganymede Transit begins at 14 hours 44.0 minutes
Ganymede Shadow Transit ends at 20 hours 44.0 minutes

 

Earth direction along green line to the left

Sun direction along blue line to the left

Orbits as seen from above.  Moons orbit counter-clockwise.  Black dots represent location of respective moon at 0h, 6h, 12h, 18h, and 24h UTC.

Purple path: Io
Blue path: Europa
Yellow path: Ganymede
Red path: Callisto

Orbital Ribbons: These are the spacial and temporal connections between the four Jovian Moons.  Black dot indicates location of Jupiter

 

Jupiter Today | 19 May 2017 | Past 700 Million Miles

Distances:

At 0 hours UTC, Jupiter is 815983419.28 km from the Sun.
    6472.52 km closer to the Sun than yesterday
    Accelerating towards the Sun at a radial velocity of 269.73 km/h (1.73 km/h slower than yesterday)

At 0 hours UTC, Jupiter is 700839108.21 km from the Earth.
    1561361.83 km further from the Earth than yesterday
    Accelerating away from the Earth at a radial velocity of 66356.04 km/h (1299.30 km/h faster than yesterday)

Positions and Motion:

At 0.00 hours UTC, Io is in quadrant 3, 420614.36 km from Jupiter.
At 6.00 hours UTC, Io is in quadrant 4, 420022.20 km from Jupiter.
At 12.00 hours UTC, Io is in quadrant 4, 420746.31 km from Jupiter.
    ===> Maximum Western Elongation <===
At 18.00 hours UTC, Io is in quadrant 1, 422228.68 km from Jupiter.
At 24.00 hours UTC, Io is in quadrant 1, 423361.55 km from Jupiter.

At 0.00 hours UTC, Europa is in quadrant 3, 676590.95 km from Jupiter.
At 6.00 hours UTC, Europa is in quadrant 4, 677189.28 km from Jupiter.
At 12.00 hours UTC, Europa is in quadrant 4, 676591.07 km from Jupiter.
At 18.00 hours UTC, Europa is in quadrant 4, 674928.93 km from Jupiter.
    ===> Maximum Western Elongation <===
At 24.00 hours UTC, Europa is in quadrant 4, 672527.48 km from Jupiter.

At 0.00 hours UTC, Ganymede is in quadrant 3, 1069002.94 km from Jupiter.
At 6.00 hours UTC, Ganymede is in quadrant 3, 1068654.84 km from Jupiter.
At 12.00 hours UTC, Ganymede is in quadrant 3, 1068392.84 km from Jupiter.
At 18.00 hours UTC, Ganymede is in quadrant 3, 1068233.59 km from Jupiter.
At 24.00 hours UTC, Ganymede is in quadrant 3, 1068186.68 km from Jupiter.

At 0.00 hours UTC, Callisto is in quadrant 2, 1895856.52 km from Jupiter.
At 6.00 hours UTC, Callisto is in quadrant 2, 1895404.07 km from Jupiter.
At 12.00 hours UTC, Callisto is in quadrant 2, 1894856.16 km from Jupiter.
At 18.00 hours UTC, Callisto is in quadrant 2, 1894212.38 km from Jupiter.
At 24.00 hours UTC, Callisto is in quadrant 2, 1893468.90 km from Jupiter.

Io goes through an perijove at 5 hours 41 minutes UTC at a distance of 420020.17 km.
Europa goes through an apojove at 6 hours 0 minutes UTC at a distance of 677189.28 km.
Ganymede goes through an perijove at 23 hours 27 minutes UTC at a distance of 1068186.20 km.

Events:

Io Transit begins at 3 hours 2.0 minutes
Io Shadow Transit begins at 3 hours 54.0 minutes
Io Transit ends at 5 hours 13.0 minutes
Io Shadow Transit ends at 6 hours 5.0 minutes
Europa Transit begins at 0 hours 29.0 minutes
Europa Shadow Transit begins at 2 hours 17.0 minutes
Europa Transit ends at 2 hours 56.0 minutes
Europa Shadow Transit ends at 4 hours 43.0 minutes

Earth direction along green line to the left

Sun direction along blue line to the left

Orbits as seen from above.  Moons orbit counter-clockwise.  Black dots represent location of respective moon at 0h, 6h, 12h, 18h, and 24h UTC.

Purple path: Io
Blue path: Europa
Yellow path: Ganymede
Red path: Callisto

Orbital Ribbons: These are the spacial and temporal connections between the four Jovian Moons.  Black dot indicates location of Jupiter

 

Jupiter Today | 18 May 2017

Distance:

At 0 hours UTC, Jupiter is 815989892.80 km from the Sun.
    6514.94 km closer to the Sun than yesterday
    Accelerating towards the Sun at a radial velocity of 271.46 km/h (0.91 km/h slower than yesterday)

At 0 hours UTC, Jupiter is 699246563.27 km from the Earth.
    1561361.83 km further from the Earth than yesterday
    Accelerating away from the Earth at a radial velocity of 65056.74 km/h (1322.06 km/h faster than yesterday)

Positions and Motion:

At 0.00 hours UTC, Io is in quadrant 1, 422296.71 km from Jupiter.
At 6.00 hours UTC, Io is in quadrant 1, 423394.91 km from Jupiter.
At 12.00 hours UTC, Io is in quadrant 2, 423290.40 km from Jupiter.
At 18.00 hours UTC, Io is in quadrant 2, 422063.93 km from Jupiter.
    ===> Maximum Eastern Elongation <===
At 24.00 hours UTC, Io is in quadrant 2, 420614.36 km from Jupiter.

At 0.00 hours UTC, Europa is in quadrant 2, 667338.10 km from Jupiter.
    ===> Maximum Eastern Elongation <===
At 6.00 hours UTC, Europa is in quadrant 2, 669806.84 km from Jupiter.
At 12.00 hours UTC, Europa is in quadrant 3, 672508.76 km from Jupiter.
At 18.00 hours UTC, Europa is in quadrant 3, 674922.62 km from Jupiter.
At 24.00 hours UTC, Europa is in quadrant 3, 676590.95 km from Jupiter.

At 0.00 hours UTC, Ganymede is in quadrant 2, 1070806.18 km from Jupiter.
At 6.00 hours UTC, Ganymede is in quadrant 2, 1070336.57 km from Jupiter.
At 12.00 hours UTC, Ganymede is in quadrant 2, 1069866.77 km from Jupiter.
At 18.00 hours UTC, Ganymede is in quadrant 2, 1069415.14 km from Jupiter.
    ===> Maximum Eastern Elongation <===
At 24.00 hours UTC, Ganymede is in quadrant 2, 1069002.94 km from Jupiter.

At 0.00 hours UTC, Callisto is in quadrant 1, 1896545.88 km from Jupiter.
At 6.00 hours UTC, Callisto is in quadrant 1, 1896560.73 km from Jupiter.
At 12.00 hours UTC, Callisto is in quadrant 1, 1896445.90 km from Jupiter.
At 18.00 hours UTC, Callisto is in quadrant 2, 1896207.46 km from Jupiter.
At 24.00 hours UTC, Callisto is in quadrant 2, 1895856.52 km from Jupiter.

Io goes through an apojove at 8 hours 32 minutes UTC at a distance of 423515.69 km.
Callisto goes through an apojove at 3 hours 41 minutes UTC at a distance of 1896570.44 km.

Events:

Io Occultation disappears at 5 hours 45.0 minutes
Io Eclipse reappears at 8 hours 50.1 minutes

 


Earth direction along green line to the left

Sun direction along blue line to the left

Orbits as seen from above.  Moons orbit counter-clockwise.  Black dots represent location of respective moon at 0h, 6h, 12h, 18h, and 24h UTC.

Purple path: Io
Blue path: Europa
Yellow path: Ganymede
Red path: Callisto

Orbital Ribbons: These are the spacial and temporal connections between the four Jovian Moons.  Black dot indicates location of Jupiter

 

Jupiter Today | 17 May 2017

Distances:

At 0 hours UTC, Jupiter is 815996407.74 km from the Sun.
    6536.92 km closer to the Sun than yesterday
    Accelerating towards the Sun at a radial velocity of 272.37 km/h (3.66 km/h faster than yesterday)

At 0 hours UTC, Jupiter is 697685201.44 km from the Earth.
    15296322.24 km further from the Earth than yesterday
    Accelerating away from the Earth at a radial velocity of 63734.68 km/h (1341.93 km/h faster than yesterday)

Position and Motion:

At 0.00 hours UTC, Io is in quadrant 3, 421967.74 km from Jupiter.
At 6.00 hours UTC, Io is in quadrant 3, 420535.15 km from Jupiter.
At 12.00 hours UTC, Io is in quadrant 4, 420015.05 km from Jupiter.
At 18.00 hours UTC, Io is in quadrant 4, 420799.11 km from Jupiter.
    ===> Maximum Western Elongation <===
At 24.00 hours UTC, Io is in quadrant 4, 422296.71 km from Jupiter.

At 0.00 hours UTC, Europa is in quadrant 1, 667217.32 km from Jupiter.
At 6.00 hours UTC, Europa is in quadrant 1, 665524.57 km from Jupiter.
At 12.00 hours UTC, Europa is in quadrant 2, 664941.92 km from Jupiter.
At 18.00 hours UTC, Europa is in quadrant 2, 665594.86 km from Jupiter.
At 24.00 hours UTC, Europa is in quadrant 2, 667338.10 km from Jupiter.

At 0.00 hours UTC, Ganymede is in quadrant 1, 1072287.52 km from Jupiter.
At 6.00 hours UTC, Ganymede is in quadrant 2, 1072014.15 km from Jupiter.
At 12.00 hours UTC, Ganymede is in quadrant 2, 1071665.34 km from Jupiter.
At 18.00 hours UTC, Ganymede is in quadrant 2, 1071256.07 km from Jupiter.
At 24.00 hours UTC, Ganymede is in quadrant 2, 1070806.18 km from Jupiter.

At 0.00 hours UTC, Callisto is in quadrant 1, 1895292.77 km from Jupiter.
At 6.00 hours UTC, Callisto is in quadrant 1, 1895768.75 km from Jupiter.
At 12.00 hours UTC, Callisto is in quadrant 1, 1896140.87 km from Jupiter.
At 18.00 hours UTC, Callisto is in quadrant 1, 1896403.17 km from Jupiter.
At 24.00 hours UTC, Callisto is in quadrant 1, 1896545.88 km from Jupiter.

Io goes through an perijove at 11 hours 21 minutes UTC at a distance of 420006.82 km.
Europa goes through an perijove at 11 hours 49 minutes UTC at a distance of 664941.38 km.

Events:

Io Transit begins at 8 hours 35.0 minutes
Io Shadow Transit begins at 9 hours 25.0 minutes
Io Transit ends at 10 hours 46.0 minutes
Io Shadow Transit ends at 11 hours 36.0 minutes
Europa Occultation disappears at 6 hours 5.0 minutes
Europa Eclipse reappears at 10 hours 11.4 minutes
Ganymede Occultation disappears at 1 hour 6.0 minutes
Ganymede Occultation reappears at 3 hours 28.0 minutes
Ganymede Eclipse disappears at 4 hours 33.4 minutes
Ganymede Eclipse reappears at 6 hours 54.3 minutes

Earth direction along green line to the left

Sun direction along blue line to the left

Orbits as seen from above.  Moons orbit counter-clockwise.  Black dots represent location of respective moon at 0h, 6h, 12h, 18h, and 24h UTC.

Purple path: Io
Blue path: Europa
Yellow path: Ganymede
Red path: Callisto

Orbital Ribbons: These are the spacial and temporal connections between the four Jovian Moons.  Black dot indicates location of Jupiter

 

Jupiter Today | 16 May 2017

Distances:

At 0 hours UTC, Jupiter is 816002944.66 km from the Sun.
    6448.99 km closer to the Sun than yesterday
    Moving towards the Sun at a radial velocity of 268.71 km/h (2.72 km/h faster than yesterday)

At 0 hours UTC, Jupiter is 696155569.20 km from the Earth.
    1497426.01 km further from the Earth than yesterday
    Moving away from the Earth at a radial velocity of 62392.75 km/h (1384.24 km/h faster than yesterday)

Positions and Motion:

At 0.00 hours UTC, Io is in quadrant 1, 420888.14 km from Jupiter.
    ===> Maximum Western Elongation <===
At 6.00 hours UTC, Io is in quadrant 1, 422385.79 km from Jupiter.
At 12.00 hours UTC, Io is in quadrant 2, 423425.40 km from Jupiter.
At 18.00 hours UTC, Io is in quadrant 2, 423243.71 km from Jupiter.
    ===> Maximum Eastern Elongation <===
 At 24.00 hours UTC, Io is in quadrant 2, 421967.74 km from Jupiter.

At 0.00 hours UTC, Europa is in quadrant 4, 676550.01 km from Jupiter.
At 6.00 hours UTC, Europa is in quadrant 4, 674827.60 km from Jupiter.
    ===> Maximum Western Elongation <===
At 12.00 hours UTC, Europa is in quadrant 4, 672377.56 km from Jupiter.
At 18.00 hours UTC, Europa is in quadrant 1, 669665.37 km from Jupiter.
At 24.00 hours UTC, Europa is in quadrant 1, 667217.32 km from Jupiter.

At 0.00 hours UTC, Ganymede is in quadrant 1, 1072434.43 km from Jupiter.
At 6.00 hours UTC, Ganymede is in quadrant 1, 1072550.36 km from Jupiter.
At 12.00 hours UTC, Ganymede is in quadrant 1, 1072563.72 km from Jupiter.
At 18.00 hours UTC, Ganymede is in quadrant 1, 1072473.91 km from Jupiter.
At 24.00 hours UTC, Ganymede is in quadrant 1, 1072287.52 km from Jupiter.

At 0.00 hours UTC, Callisto is in quadrant 1, 1892313.76 km from Jupiter.
At 6.00 hours UTC, Callisto is in quadrant 1, 1893223.91 km from Jupiter.
At 12.00 hours UTC, Callisto is in quadrant 1, 1894024.26 km from Jupiter.
At 18.00 hours UTC, Callisto is in quadrant 1, 1894712.69 km from Jupiter.
At 24.00 hours UTC, Callisto is in quadrant 1, 1895292.77 km from Jupiter.

Io goes through an apojove at 14 hours 11 minutes UTC at a distance of 423515.58 km.
Ganymede goes through an apojove at 9 hours 46 minutes UTC at a distance of 1072571.00 km.

Events:

Io Occultation disappears at 11 hours 18.0 minutes
Io Eclipse reappears at 14 hours 21.4 minutes

Earth direction along green line to the left

Sun direction along blue line to the left

Orbits as seen from above.  Moons orbit counter-clockwise.  Black dots represent location of respective moon at 0h, 6h, 12h, 18h, and 24h UTC.

Purple path: Io
Blue path: Europa
Yellow path: Ganymede
Red path: Callisto

Orbital Ribbons: These are the spacial and temporal connections between the four Jovian Moons.  Black dot indicates location of Jupiter

Jupiter Today | 15 May 2017

Distances:

At 0 hours UTC, Jupiter is 816009393.65 km from the Sun.
    6383.67 km closer to the Sun than yesterday
    Moving towards the Sun at a radial velocity of 265.99 km/h (6.83 km/h faster than yesterday)

At 0 hours UTC, Jupiter is 694658143.19 km from the Earth.
    1464664.96 km further from the Earth than yesterday
    Moving away from the Earth at a radial velocity of 61027.71 km/h (1384.24 km/h faster than yesterday)

Position and Motion:

At 0.00 hours UTC, Io is in quadrant 2, 423197.26 km from Jupiter.
    ===> Maximum Eastern Elongation <===
At 6.00 hours UTC, Io is in quadrant 2, 421898.10 km from Jupiter.
At 12.00 hours UTC, Io is in quadrant 3, 420494.17 km from Jupiter.
At 18.00 hours UTC, Io is in quadrant 4, 420040.81 km from Jupiter.
At 24.00 hours UTC, Io is in quadrant 4, 420888.14 km from Jupiter.

At 0.00 hours UTC, Europa is in quadrant 3, 672660.74 km from Jupiter.
At 6.00 hours UTC, Europa is in quadrant 3, 675048.65 km from Jupiter.
At 12.00 hours UTC, Europa is in quadrant 4, 676673.31 km from Jupiter.
At 18.00 hours UTC, Europa is in quadrant 4, 677212.75 km from Jupiter.
At 24.00 hours UTC, Europa is in quadrant 4, 676550.01 km from Jupiter.

At 0.00 hours UTC, Ganymede is in quadrant 4, 1071202.50 km from Jupiter.
At 6.00 hours UTC, Ganymede is in quadrant 4, 1071594.13 km from Jupiter.
    ===> Maximum Western Elongation <===
At 12.00 hours UTC, Ganymede is in quadrant 1, 1071940.95 km from Jupiter.
At 18.00 hours UTC, Ganymede is in quadrant 1, 1072226.41 km from Jupiter.
At 24.00 hours UTC, Ganymede is in quadrant 1, 1072434.43 km from Jupiter.

At 0.00 hours UTC, Callisto is in quadrant 1, 1887862.41 km from Jupiter.
At 6.00 hours UTC, Callisto is in quadrant 1, 1889061.76 km from Jupiter.
At 12.00 hours UTC, Callisto is in quadrant 1, 1890214.17 km from Jupiter.
At 18.00 hours UTC, Callisto is in quadrant 1, 1891304.59 km from Jupiter.
At 24.00 hours UTC, Callisto is in quadrant 1, 1892313.76 km from Jupiter.

Io goes through an perijove at 17 hours 2 minutes UTC at a distance of 420022.26 km.
Europa goes through an apojove at 17 hours 41 minutes UTC at a distance of 677214.47 km.

Events:

Io Transit begins at 14 hours 8.0 minutes
Io Shadow Transit begins at 14 hours 57.0 minutes
Io Transit ends at 16 hours 19.0 minutes
Io Shadow Transit ends at 17 hours 8.0 minutes
Europa Transit begins at 11 hours 18.0 minutes
Europa Shadow Transit begins at 12 hours 58.0 minutes
Europa Transit ends at 13 hours 44.0 minutes
Europa Shadow Transit ends at 15 hours 24.0 minutes

 

Earth direction along green line to the left

Sun direction along blue line to the left

Orbits as seen from above.  Moons orbit counter-clockwise.  Black dots represent location of respective moon at 0h, 6h, 12h, 18h, and 24h UTC.

Purple path: Io
Blue path: Europa
Yellow path: Ganymede
Red path: Callisto

Orbital Ribbons: These are the spacial and temporal connections between the four Jovian Moons.  Black dot indicates location of Jupiter