LtE in CMO #281

From Johan WARELL

® . . . . . . Date: Tue, 14 Oct 2003 23:23:13 -0400

Subject: Mars October 9, 12, 13, 14




Here are a few more Mars images. The limited dust activity in Hellas seems largely subsided now. Last night's visual view of Hellas had a considerably decreased yellow tinge than two nights before and activity seemed concentrated to NE Hellas.


Two visual drawings will follow as they have been scanned.


Best wishes,


WARELL’s two drawings are given by:


® . . . . . . .Date: Sun, 19 Oct 2003 13:15:21 -0700

Subject: Mars Oct 12-19


Dear Richard, Dan, and Masami,


In the next two mails follow another batch of visual and webcam Mars observations from the past week. From both visual observations and images I would conclude that Hellas was unusually dusty on Oct 12, slightly less so on the 13th, and basically dust free on the 14th. While Hellas was near the limb, I do not think this was only a phase angle effect when comparing images and drawings from mid September, because though the clouds were brighter now as would be expected, Hellas' yellow tinge was also stronger.


Is it just my imagination, or has the small dusky spot of Deltoton Sinus become darker during the past month?


Best wishes,


WARELL’s images from 15 Oct to 19 Oct are as follows;


® . . . . . . .Date: Wed, 22 Oct 2003 23:39:37 +0900

Subject: Mars Oct 20, 21




Two more Mars images follow in the next mail, nothing spectacular to write about.


Please note that I have now a NEW E-MAIL ADDRESS:


Please remove the former netscape address as it has stopped working completely.


Best wishes,


Johan WARELL (Lunar and Planetary Laboratory, Tucson, Arizona, USA)

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