Mars just before 2020 opposition

Mars just before 2020 opposition

Mars a week before closest approach 3.5" Questar telescope with a Mars contrast filter, 2x Dakin Barlow lens, for an equivalent focal length of about 2400 mm. A ZWO ASI224MC camera captured 17,643 frames in 300 sec starting at 2020-09-30 05:27:02 UT. Exposure 15.14 msec and gain 209. Mars was 22.4 arc sec in diameter.

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Date Taken: 2020-09-30
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