Io and impact scar


About the Image


    This image shows Io just starting to transit across the face of Jupiter.  In the first image, (top left) you can very faintly see the light debris cloud left from a comet that impacted the giant planet.  The exact date of impact is unknown, but was first noted on July 19th 2009 by amateur astronomer Mike Salway, who is located in Australia.


DATE/TIME:  The evening of August 2nd and morning of the 3rd, 2009 @ approximately 11:45 - 12:15pm CST.

CAMERA:  Imaging Source video cam, DMK21au04.

TELESCOPE:  Celestron C9.25 (235mm) SCT @ F/25.

BARLOW: 2.5x Telvue powermate.

SOFTWARE:  Registax, Photoshop.


Jupiter,  Average distance from the Sun, 483.7 million miles.

Average distance from Earth, 390.7 million miles.

Rotation period, (days) 9.9 hours.

Orbital period, (year) 11.9 Earth years.

Diameter, 88,846 miles.

Gravity, 100 Earth pounds = 250 pounds on Jupiter.

Moons, 63.

Jupiter is the largest planet in our solar system.  Largely made up of hydrogen and helium, Jupiter has the appearance of being layered. This effect is further enhanced by alternating east and west winds with separate zones of composition and temperature. The “Great Red Spot,” has winds of an estimated 400 miles per hour.

Jupiter’s extremely large number of moons include the four Galilean moons, Io, Europa, Ganymede and Callisto. Discovered by Galileo Galilee over 400 years ago.




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