Mars, Phobos & Deimos
Taken by Dennis Simmons on May 21, 2015 @
Brisbane, Qld, Australia
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Camera Used: Unavailable Unavailable
Exposure Time: Unavailable
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ISO: Unavailable
Date Taken: 2016:05:24 19:33:56
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Details:
My previous attempt at recording the two diminutive moons of Mars, Phobos & Deimos, using my Mewlon 180 (a 7 inch F12 ‘scope) was made difficult by the moons appearing within one of the 6 light (diffraction) spikes caused by the Mewlon’s 3 vane secondary spider. Deimos was relatively easy but Phobos had to be gently teased out of the data.
A few days later, I tried again with a Celestron C9.25, which only has a central obstruction and no secondary vanes in which these moons could hide.
Here are the results with the following data and screen capture provided by SkyTools 3 Pro.
21st May 2016 at 12:44am AEST (UT+10).
Mars
R.A.: 15h59m33.0s Dec.: -21°38'25" (2000) in Scorpius
Magnitude: -2.03
Size: 18"
Satellites:
Name Mag PA° Sep"
Phobos 11.3 130.9 24.5
Deimos 12.4 127.8 62.8
Current Status:
Earth Distance: 0.5 AU
Sun Distance: 1.5 AU
Diameter: 6794.0 km
Celestron C9.25, TeleVue x2 PowerMate, Atik 414EX ccd camera.
Cheers
Dennis
Photographer's website:
No URL provided.
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