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Venus Image 2017/02/13(UT)
Toshihisa Tsurumi,Paul G. Abel,Szabolcs Nagy,Stanislas Maksmowicz
T.Tsurumi,P.Abel,S.Nagy,S.Maksmowicz
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Toshihisa Tsurumi(250mm Dall Kirkham) |
≪岡山県岡山市 鶴海敏久≫[Toshihisa Tsurumi:Okayama-City Okayama-Prefecture Japan]
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Paul G. Abel(508mm Dall-Kirkham) |
The phase is getting quite small now,so the main feature on the disk is the terminator shading. It did seem to me that the southern cusp was slightly deforming the terminator- IO only noticed this in the W#21 and the W#47 (although I was able to see it in IL afterwards but as pronounced). Now,seeing has been rather poor this afternoon so I wouldn't be at all surprised to learn that it was a seeing artefact! Other points include:
Illuminated Disk: Not much to see on the disk now as the phase is rather small- terminator shading seems to be the main markings.
Unilluminated Disk: Not visible.Bright Limb Band: Visible and Complete,
Terminator: Geometrically regular- it did seem that the southern cusp slightly deformed the terminator in the far south.
Cusp Caps: Both present.
Cusp Collars: Both seen? There was a small amount of shading in the position where one would expect them to start/finish.
[Paul G. Abel:Leicester:United Kingdom]
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Szabolcs Nagy(127 Maksutov Cassegrain) |
[Szabolcs Nagy: London United Kingdom]
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Stanislas Maksymowicz (280mm,230mm cassegrain or 200mm VMC or 150mm refracter) |
AL was not there in the 90mm refractor with good images, transparency as well.
Color filters were used and without before Sunset and on Sunset time.
The refractor is not bad as Venus exhibits still banding features, a test on Mars with 200x shows the refractor efficiency on the 4.83" tiny disk of the planet.
[Stanislas Maksymowicz Ecquevilly,France]
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