From TAN Wei-Leong
@. . . . . . . . Hi fella mars observers.
Attached
is a mars image obtained on the 21st June
2001. The skies was finally clear after 1 weeks of cloudy skies.
I have another 11 more images which I am still in
the process of sorting them out.
Regards
and Clear Skies
(
@ . . . . . . . .To vzv03210@nifty.com: I've got some images from abt
Regards.
(
@ . . . . . . . . . Attached is a mars image from
last night (28June), I think this shows
some bright spot which could be due to the dust storm?
Not experienced to comment on anything.
Regards and Clear Skies
(29 June
9:21JST 2001 email)
@ . . . . . . . . . . Attached are the images from 28th June 2001. The dust
storm are very clear especially in the red frames.
(30 June 5:01JST
2001 email)
@ . . . . . . . . . . Attached is the image from last night. I
acquired a set of 8 images earlier and will be processing them later today.
Meanwhile for this shot I experimented with eyepiece projection and this image
was shot at f/33 for a sampling of
0.20"/pixel. Seeing was about 3-5/10. The poor seeing makes focusing very
difficult.
It seems like the region from part of
Iapygia southward to M. Hadriacum and eastward to M. Tyrrhenum and M. Cimmerium
has been covered by the massive dust storm.
There
appears to be 3 large bright areas on my image, one is at
Please take a look and correct me if I'm
wrong. I'm trying hard to learn
(
@ . . . . . . . . . Attached is the mars image from last night. Seems like
the dust storm had almost everything covered. Had to rush off for work now
(
@ . . . . . . . . . .Attached is the mars sequence
done on 1st July 2001,
this is done with the C11 at f/23.
Just finished processing it. The skies is cloudy now and I finally ha the
chance to catch a good night's sleep after staying up to image/process mars.
I think
I like this color balance more because it very similar to what I see through
the C11 instead of orange. Strange enough if I balance the RGB ratio according
to the filter characteristic and exposure times I get a orange. Most of the
images I see seem to give an orange mars. Can someone please advise me
regarding this?
(
@ . . . . . . . . . Attached is the 2nd set of image
from 2nd July 2001.
Finally had some time to process them this evening. Just came back after some
images this evening. See was horrible and there were high thin clouds up there,
will send them out later.
(
@ . . . . . . . . . Attached is my mars images from 6th July 2001.Seeing were
terrible and there were strong wind blowing for these images. There are high
clouds which dims mars by a lot.
(
@ . . . . . . . . . Attached is my mars image from 8th July 2001. Seeing
was very poor and I almost did not want to image after looking at mars thru the
eyepiece.
The area
south of Mare Sirenum appears to be obscured by dust. Area from Mare Sirenum to
part eastern part of Propontis Complex appears to be obscured by dust as well.
I noticed the area southeast of Mare
Sirenum appears to be bright. Could that be due to another dust storm in
progress?
(
@. . . . . . . . . Attached is the mars image from 9th July 2001.
Part of Mare Sirenum and part of Mare Cimmerium
appears to be obscured by dust. Area from Mare Sirenum to part eastern part of
Propontis Complex appears to be obscured by dust as well.
(
@. . . . . . . . . Attached is the mars image from 10th July 2001. Seems
like almost the whole visible disc is covered by the dust storm now, the dust
storm is still going strong.
(
@. . . . . . . . Subject: MARS IMAGES 12th July 2001
Tan Wei
Leong,
Celestron 11" SCT with
Televue 2.5x powermate to f/23
Integration Times:
Red : 9 x 0.11 sec
Green : Average of Red and
Blue
Blue : 10 x 0.4 sec
Seeing : Good (6-7/10) Skies
hazy, frequent low clouds interrupted exposures.
Altitude = about 60 degrees. No
dew.
Most
visible disc appears to be obscured by dust. Nix Olympica visible.
Regards and Clear Skies
(
@. . . . . . . .Attached is the mars image from 13th July 2001.
(
@. . . . . . . Attached is the mars image from 14th July 2001.
Regards and Clear Skies
(
@. . . . . . . . Attached is the mars image from 15th July 2001.
MARS
IMAGES
Tan Wei
Leong,
Celestron 11" SCT with
Televue 2.5x powermate to f/23
Integration Times:
Red : 0.11 sec
Green : Average of Red and
Blue
Blue : 0.4 sec
Seeing : Very Good (6-7/10)
Altitude = about 60 degrees. No
dew.
Nix Olympica, Tharsis, Juventae Fons, Tithonius
Lacus Visible. Clouds at north polar region appears white in eyepiece.
Regards and Clear Skies
(
@. . . . . . . . Attached is the updated mars image
for 15th July 2001.
The last image in the original one that I send out had a mistake in the UT time
(it was my local time).
Regards and Clear Skies
(
@. . . . . . . . .Attached is the mars image from 17th July 2001.
Seeing was excellent (7-8/10). More surface details
seem to be visible compared to the earlier images?
Regards and Clear Skies
(
@. . . . . . . .Attached is the mars image from 18th July 2001.
Regards and Clear Skies
(
@. . . . . . . .Attached is my mars image on 21st July 2001. High and
thick haze present making imaging difficult. A/D counts were only 25% compared
to when conditions were good. Seems like the dust storm is still going strong,
lack of surface details noted over the southern hemisphere.
(
@. . . . . . . .Attached is the mars image from 23rd July 2001. Seeing
is about 5-6/10 and transparency is the best so far. For my "very
clear" nights in the past, I've got about 16,000 A/D counts for my red
filtered image. For this evening I got almost 18,000 A/D counts. Due to this I
shorten the blue exposure for the last 2 frames to 0.3sec and you can see
lesser saturation on the blue frames.
I could
see the 3 mag 13.2 stars near to mars in the eyepiece as well.
Most
part of the southern hemisphere appears to be still obscured by dust. I noticed
the strange "strip" near the north polar region, this part seems to
be change daily from the images.
(
@. . . . . . . . Attached is the mars image from 24th July 2001. Fast
seeing and low clouds interrupting exposures.
(
@ . . . . . . . Attached is the mars image from 29th July 2001. The
skies cleared up at
Syrtis
Major is seen in the image.
(
@ . . . . . . . Attached is the mars image from 30th July 2001. Seeing
is pretty good for these images. I took the chance for some lunar shots as
well.
(
@. . . . . . . . Subject: mars image
Some details were noted in the image.
They were easily visible in the eyepiece.
(
>MARS
IMAGES 5th August 2001
>
>Tan
Wei
>weileong@singnet.com.sg
>
> Celestron 11" SCT with
Televue 2.5x powermate to f/23
> Integration Times:
> Red : 20 x 0.3 sec
> Green : Average of Red and
Blue
> Blue : 12 x 1.00 sec
>
>
>Seeing
: Poor (3-4/10), Transparency : (2/10)
>Altitude
= about 58 degrees. No dew.
>
@. . . . . .. . Attached is the mars image from 6th August 2001. The
phase causes mars to look like an egg :)
The
sky continues to be cloudy and seeing remains poor.
(
TAN Wei-Leong (
