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Mercury 1st September 2019


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About this observation
Chris Hooker
Time of observation
01/09/2019 - 08:30
Observing location
Didcot, Oxfordshire
254 mm Newtonian
3x Barlow lens
ZWO ASI120MM-S camera
Baader 610nm & IR-cut filters
0.35 msec @ F/19

Mercury imaged near superior conjunction in reasonably good seeing and transparency conditions, but there was some slight haze which reduced the contrast of the planet significantly. Sixty video sequences were captured, but after inspection half of them were discarded as being of too poor quality. Processing was made very difficult by the low contrast of the images, but after a combination of software and manual frame selection the result is acceptable. The bright region just inward of the limb at 10 o'clock is Caloris Planitia, and the two darker regions at 12 and 3 o'clock also match the blurred Messenger image. Other features are less convincing, but there is some similarity. 

For a discussion of the precautions required for imaging Mercury in close proximity to the Sun, please see my post on June 5th last year.

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