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Venus Image 2012/04/19(UT)
Carl Roussell,Stanislas Maksmowicz,Manos Kardasis
C.Roussell,S.Maksmowicz,Kardasis
|
Carl Roussell(150mm F8 refractor) |
2012/04/19 01:12 UT
15cm f/8 RR 200X - 400X
W47
See: 7/10 Trans: Clear
Dia: 28.9" Phase: 0.37 Phase Est: 0.37
CM1: 264 CM2: 240
[ Carl Roussell : Hamilton Canada]
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Stanislas Maksymowicz (127mm cassegrain) |
I try still the researh of the ashen light and this remains from my
oppinion not fruitfull.
The O3 filter makes the un-lighted part of the disk darker than sky,
The CLS,R and polarising filters makes the un-lighted part of the disk
slighly brighterer than sky and only near the terminator on half width on
the un-lighted part disk.
O3,R and CLS are narrow band width filters from Astronomik used with the
present scope and 1.27mm exit pupill diameter (seems to be an optimum for
visual viewing).
The survey needs to be pursuied.
For the moment this remains un-significant.
For your perusal.
Have good receipt of the present mail.
[Stanislas Maksymowicz Ecquevilly,France]
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Manos Kardasis (280mm SCT ) |
A shot under very good conditions.Some structures visible on the UV image
[Manos Kardasis,Glyfada-Athens;Greece]
《カーダシス マノス:ギリシャ アテネ》
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