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(2012-11-17 04:15)

About this Object

Jupiter is the fifth planet from the Sun and the largest planet in the Solar System. It is a gas giant with mass one-thousandth of that of the Sun, and is classified as a gas giant along with Saturn, Uranus and Neptune. Jupiter is primarily composed of hydrogen with a quarter of its mass being helium. It may also have a rocky core of heavier elements, but like the other gas giants, Jupiter lacks a well-defined solid surface. Because of its rapid rotation, the planet's shape is that of an oblate spheroid (it possesses a slight but noticeable bulge around the equator). The outer atmosphere is visibly segregated into several bands at different latitudes, resulting in turbulence and storms along their interacting boundaries. A prominent result is the Great Red Spot, a giant storm that is known to have existed since at least the 17th century when it was first seen by telescope. Jupiter was known by astronomers of ancient times, and was associated with the mythology and religious beliefs of many cultures.

About this Image

This is my first 'real' planetary image. It gave me a sense of a 4-inch Telescope's limitations, and by processing this image, I learned how to capture and stack images captured with a webcam. I look forward to revisiting this object with a 4x PowerMate, and capturing moons, their shadows, and the Great Red Spot.

--- Date/Time ---
Local: 2012-11-17 04:15:00
UTC: 2012-11-17 09:15:00

--- Location ---
The Ashton Observatory at Johnson Farms, Ashton MD
(Latitude N39.15°, Longitude W77.01°, Elevation 510')

--- Conditions ---
Temperature: 30° Medium seeing

--- Optics ---
Televue NP101is 101mm f/5.35 Refractor with Televue 2x PowerMate

--- Camera ---
Celestron NexImage 5

--- Post-Processing ---
RegiStax, PhotoShop

--- Selected Ephemeris ---
613.35 million miles from Earth and 755.42 million miles from the Sun
Apparent Diameter: 48.02 arcminutes. Magnitude: -2
Percent Illuminated: 99.91%. Elongation from Sun: 162.05°

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