LtE in CMO #280

From Thomas A DOBBINS

. . . . . . . .Date: Tue, 30 Sep 2003 23:18:13 -0400

Subject: Re: Sept. 21-26: Mars


Dear Nicholas et al:


You may be interested to compare your rendering of the Solis Lacus region with the attached image taken at 3:40 UT on 26 Sept. in superb seeing by Ohio standards, especially when one considers that the planet's elevation was only 33 degrees above the horizon. A wedge prism was employed to correct atmospheric dispersion. The ToUcam image is 395 frames out of 800 (at 10 frames per second, exposures 1/33-second with Astronomik Minus IR filter at f/28 with my C-14.)


. . . . . . . .Date: Tue, 7 Oct 2003 19:30:09 -0400

Subject: Re: Mars Images




In your image from 5:28 UT on 4 October a very ruddy hue is evident in Daedalia and portions of southern Tharsis. This intense coloration is also evident in my image (attached) taken on Sept. 26 at 3:40 UT. Rather interesting, eh what?...


. . . . . . . .Date: Wed, 8 Oct 2003 02:19:37 -0400

Subject: Possible obscuration of Yaonis Regio and Mare Amphitrites - Is dust finally beginning to stir?


Attached please find an image taken at 1:50 UT on October 8. Clouds and hazes are present over Syrtis on the evening limb. Visually, Hellas appeared brilliant through Wratten 12 and 15 filters.


Features in Yaonis Regio and Mare Amphitrites from southern Hellas/Zea Lacus to the periphery of the polar cap appear to be obscured. The Hellespontus/Charis is unusually well delineated.


Tom DOBBINS (Howard, OH, USA)

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