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Mars Image 2023/04/07(UT)
Javier Beltran Jovani,Manos Kardasis,Mike Karakas,Paul G. Abel,Dmitry W. von Aichegg,Gregory.T.Shanos
Javier,Kardasis,M.Karakas,P.Abel,Dmitry.W,G.T.Shanos
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解説（安達）/ Comment by Makoto Adachi
[Javier Beltran Jovani:Castellon-Spain]
Channels pesented separated for inspection of the possible blue clearing:
[Manos Kardasis,Glyfada-Athens;Greece]
《カーダシス マノス:ギリシャ アテネ》
[Mike Karakas : Winnipeg Canada]
To begin with the seeing was fair but it did drop off about half way through. The apparent diameter of Mars is now quite small- some 6.2",and requires high powers to see anything meaningful. A number of details were seen:
・The whole of the preceding limb was very bright suggesting the presence of evening clouds
・There was a brilliant patch from the prec. limb extending onto the disk- this was possibly bright clouds in the Argyre I basin.
・Mare Erythraeum contained some structure and seemed to be darker in its south-prec region.
・Solis Lacus can be seen although it now lacks the complex structures seen earlier in the apparition when Mars was closer.
・Aurorae Sinus was rather darl- perhaps the darkest feature on the disk. I was surprised to be able to see Ganges and a brightness in Ophir and Candor.
・To the north,Acidalium can be seen and Nilokeras.
・There seemed to be a fainter Lowell band around the north polar cap which was quite bright.
[Paul G. Abel:Leicester:United Kingdom]
2023/04/07 18:46(UT),Seeing 6/10 Trans 5/5
[Dmitry W. von Aichegg : Domodedovo,Moscow Russia]
Mars is exhibiting blue clearing. See attached images. I am taking a luminance image with a UV-IR cut filter, then a blue clearing image with a UV-IR cut filter and Violet #47 filter, and with the blue filter in the RGB filter set. The blue images appear identical to the luminance image- blue clearing of 3. The blue normally is not this transparent, and the albedo features are not readily visible.
I encourage everyone to please image Mars to confirm blue clearing. Manos Kardadis has observed this phenomenon in his images. Thank you Manos.
[Gregory T.Shanos : Sarasota,Florida,USA]
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