ダミアン・ピーチも指摘しているように、大きなシルチスと
サバエウスさらに北極を取り巻くように暗い部分が目立っている。
シルチスは太くしっかりしたイメージで捉えられており、中央
付近の295W、+5の付近は淡くなっていることが分かる。11月６日の
観測では北極冠が見られていたが、この画像では写っていない。
極付近によく起こるダストに覆われている可能性がある。また、
ヘラス(Hellas;300W,-50)が白くないことも大切な情報だ。

Syrtis Major, Sinus Sabaeus, and the dark band which surrounds
the North Pole are conspicuous well as Damian Peach points out.
Syrtis Major is mainly deteriorated thick. The center of
the Syrtis Major(295W、+5) becomes light. NPC was
deteriorated on Nobember 6th but today, it can not be
seen. There is possobility that Dust covers NPR.
The thing that the Hellas isn't white　is important
information.
-------------------------------------------------------------------------------------

Here are some Mars images from Nov 13th and 14th. The
Planet is now just about high enough
to obtain some images. The main reason ive been able
to capture a reasonable level of detail
is by use of my camera's tiny, sub-frame mode,
allowing 2-3images/second.

Syrtis major looks prominent, with also Sabeaus Sinus
on the 13th, and dusky markings to around the NPC
area on both sets of images. Also not the faint
projection around the Mare Serpentis area, extending
south toward Hellas
seen in both sets.

Will obtain more when the seeing improves again (this
morning was to unsteady!.)
Best Wishes
Damian

INFORMATION FOR MARS IMAGES, NOVEMBER 13th, 2002.

D. A. Peach, Costa del Silencio, Tenerife, Canary Isl.
12" (30.5cm) Meade SCT @ f/29.1. ST-5c camera in 1/4 frame mode..
SBIG RGB Filter set & True Tech IR Filter.

Total Exposure Times:

IR (800 - 1200nm Filter.): 29 x 0.16 secs
Blue Light (+IR rejection): 22 x 0.60 secs

Seeing variable (2-8.)
Transparency excellent (5.5mag.)
No wind. No dew.

Diam=3.90".
Altitude=25 degs.
[Rochester, Kent, UK.]
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