LtE in CMO #275

From Nicolas BIVER

® . . . . . . . .Date: Fri, 11 July 2003 11:56:31 +0200 (CEST)

Subject: 2003-07-10 Mars drawings

Dear all,

Seeing has been relatively good yesterday and this morning in Paris region. Please find attached here drawings I made with a 25.6-cm Newtonian yesterday (July 10) at 2:20 and 3:30 UT. Nothing special to note, low contrast to the West of Solis lacus, and northern hemisphere ill defined. Rimae in th SPC quite clear...

(All other drawings on:

http://wwwusr.obspm.fr/biver/marsnews.html#M2003)

Clear Skies,

® . . . . . . . .Date: Mon, 21 July 2003 10:50:56 +0200 (MEST)

Subject: Mars drawings 19 and 20 July 2003

Dear all Mars observers,

Here are my latest drawings with relatively good seeing.

Argenteus mons has become obvious as a very bright small (~0.8") spot on the edge of the SPC, within a brighter zone. The edge of NPH (or NPC?) is just visible on the edge of the northern limb, especially towards Mare Acidalium. Hellas seems a little paler or more yellowish than other parts of Mars "clear" zones.

Here are the details of the observing conditions (in english and usual scales for seeing and transparency):

(Left): Date/time (UT): 2003-07-19 03:05

CML: 14.2

Telescope: 25.6-cm Newtonian (x507)

Seeing: 5-7 /10 (good)

Transparency: 9/10

Location: Versailles, France

(drawing quality: 9/10 - very good)

(Right):Date/time (UT): 2003-07-20 02:17

CML: 353.3

Telescope: 25.6-cm Newtonian (x507)

Seeing: 3-5 /10 (average)