LtE in CMO #275


. . . . . . . .Date: Wed, 23 July 2003 19:19:50 +0200

Subject: Astonishing images with 4"



Dear friends,


I got very nice steady seeing this morning (at 360x !), AVI files yet processed. Starting from Saturday morning (July 19), there was a strong evidence of Argenteus Mons and Novissima Thyle with my "little" 4" refractor (Perl-Vixen fluorite 102mm F/D=8,8 with tele-extender, barlow 2x and VestaPro webcam on Super-Polaris mount). Remember that Airy disk diameter is 2,8" ! A small topographic white patch is obvious between Meridiani S. and Margaritifer S. on July 19 image (blue and composite). However, processing rules are not well defined and there are some problems with RGB channels calibration. Waiting for IR-cut filter.


Best regards,

Daniel CRUSSAIRE (Champigny-sur-Marne, France)

Departement LESIA

Observatoire de Paris-Meudon

5, place Jules Janssen

92195 MEUDON Cedex

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