LtE in CMO #276

From P Clay SHERROD



. . . . . . . .Date: Mon, 28 Jul 2003 01:16:51 -0500

Subject: Re: Mars images, July 28th.

 

Very nice as always Damian....I note that from yours and others' images of late, particularly at this longitude, we are seeing very advanced sublimation of the SPC in some areas, showing notably well on your image on the pr. side of the cap. The delineation of subtle maria contrasts in the southern hemisphere is very striking in this image, particularly around and very near (north of....) the SPC melt line.

 

. . . . . . . .Date: Mon, 28 Jul 2003 08:29:28 -0500

Subject: Mars, July 28 and very light yellow cloud activity near CM 0

 

Mars on the morning of July 28 with unsteady skies and intermittent clouds. There are very small areas which appear perhaps brightened by thin yellow clouds: Edom, Decolionis Regio (south of Sinus Sabaeus), Margaritifer Sinus, and within Eos. A northern polar region blue hood is visible in the later image and was clearly visible (not artifact) visually and on raw images.

 

Images were obtained via 1600 (each) 1/33nd sec. images, Toucam Pro with

double IR block, 0.41m SCT at f/35.

 

. . . . . . . .Date: Mon, 28 Jul 2003 09:54:53 -0500

Subject: Mars in steady air....ASO, July 28

 

Last image from July 28 under increasingly steady air; considerable low contrast and fine detail emerging in the Mare Erythraeum area and a very bright (more so than normal it seems) Margaritifer Sinus.

 

. . . . . . . .Date: Tue, 29 Jul 2003 09:53:22 -0500

Subject: Mars and reddish low-level clouds (?)

 

I inadvertently did not send the posting of our latest Mars image from the morning of July 28 to the Mars observers group. It is a fairly detailed image under steadier skies than usual and shows considerable low contrast detail as well as some curious reddish clouds (not processing artifacts....these are on several images at these Martian locations) near the CM in the better image from this date.

 

. . . . . . . .Date: Wed, 30 Jul 2003 08:35:39 -0500

Subject: Re: [marsobservers] Mars Observation July 30th 2003 09:29 UT

 

Hello Ed

Without a doubt one of your best Mars images; the clouds you refer to are extraordinary quite rapidly-developing. Your last image does indeed show these clouds, albeit not with the intensity nor density shown here. The previous image in my opinion was over-processed compared to your normal work and I think that this somehow masked the appearance of these clouds greatly.

 

Nonetheless, you had them on your last image as well....thinned and less spawned, but they are evident.

 

 

. . . . . . . .Date: Wed, 30 Jul 2003 11:57:39 -0500

Subject: ASO Adds New Observatory

 

Just a quick note to say that the new Cascade Mountain ASO is now in full swing and has earned the Harvard/MPC ObsCode designation H44; Brian will be concentrating mostly on cataclysmic variables, asteroids and NEO's as well as planetary imaging with a robotic 0.40m Newtonian from the hills of North Central Arkansas.

 

. . . . . . . .Date: Thu, 31 Jul 2003 10:20:25 -0500

Subject: Mars and expansion of yellow cloud activity

 

Mars imaged through forest fire smoke and unsteady skies, but with some nice detail of cloud development in and around Margaritifer Sinus and Mare Erythraeum.

 

. . . . . . . .Date: Fri, 1 Aug 2003 17:21:06 -0500

Subject: Re: Mars Images

 

Nice work Don....this was a very interesting learning experience to see these images. So you think the prism actually helped in your case?

 

. . . . . . . Date: Sat, 2 Aug 2003 08:34:32 -0500

Subject: ASO Mars, August 1

 

Mars from this morning between two major storm cells over Arkansas resulting in very unsteady air, but a brief pocket early for imaging. This shows a possibly developing small yellow cloud (actually brownish, color has not been modified....) in the Aeria region near the equator and CM in this shot; inset is of the irregular perimeter of the SPC.

 

 

. . . . . . . . Date: Mon, 4 Aug 2003 09:35:52 -0500

Subject: Mars, Syrtis Major region, Aug. 4, 2003

 

Mars showing the Syrtis region; skies as has been unfortunately typical this year, were quite unsteady.

16" Meade @ f/35, 1050 images, Registax and Toucam, double IR block.

 

. . . . . . . .Date: Wed, 6 Aug 2003 05:53:24 -0500

Subject: Mars Aug. 6, 2003 - Wispy clouds over Syrtis

 

Mars in poor conditions, but showing some possible wispy bluish clouds over Syrtis at this time....

 

. . . . . . . .Date: Wed, 6 Aug 2003 11:35:37 -0500

Subject: Re: Mars Aug 5th

 

Very fine image, Brian...this might be one of your best thus far.

 

. . . . . . . .Date: Thu, 7 Aug 2003 03:46:30 -0500

Subject: High clouds over Mars, Aug. 7

 

Our best image of Mars yet this apparition, taken under fairly steady skies and fog; note the high clouds west and north of the SPC; much wispy high blue clouds are noted on the western (celestial) limb of the planet. Also note the fairly dense white-blue cloud immediately W. of the SPC. A distinct "ring" within the SPC is now beginning to appear from sublimation.

 

. . . . . . . .Date: Thu, 7 Aug 2003 03:55:30 -0500

Subject: Mars, Nice detail in steady skies....

 

Another Mars image from Aug. 7, taken under fairly steady skies and fog; note the high clouds west and north of the SPC; much wispy high blue clouds are noted on the western (celestial) limb of the planet. Also note the fairly dense white-blue cloud immediately W. of the SPC. A distinct "ring" within the SPC is now beginning to appear from sublimation.

 

This image was taken shortly prior to the last one posted.

 

. . . . . . . .Date: Thu, 7 Aug 2003 05:15:40 -0500

Subject: ASO's Best Mars so far....finally

 

Finally things are looking up a bit in the seeing department....

 

ASO's BEST MARS OF 2003

 

Taken with the Petit Jean Mountain 16" Meade @ f/35, Toucam Pro and 1,000 images over 35 seconds. Registax processing, NO color nor post-processing....what you see is what it was.

 

Very nice cloud detail visible in this image of Mars taken under very steady skies with heavy fog in south. Note the clouds W. of the SPC as well as on the western limb. Much fine detail visible in the Syrtis regions but also within the red plains as well.

 

. . . . . . . .Date: Fri, 8 Aug 2003 05:17:21 -0500

Subject: Mars, August 8, 2003

 

Mars in fairly steady skies; note the inset of the SPC showing a ring of melting/sublimation. Some yellow cloud activity noted as well as continued blue-white clouds on western limb near the SPC.

 

. . . . . . . .Date: Sat, 9 Aug 2003 08:57:54 -0500

Subject: ASO Mars August 9, 2003

 

Mars imaged in poor conditions; some high clouds are evident in the earlier (0705 UT) images in high northern latitudes, notably near N. Alcyonius and the dark Hyblaeus Extension.

 

Note also on the 0705 image the appearance of a notched perimeter of the SPC (see inset).

 


Dr Clay SHERROD (Arkansas Sky Observatory, AR, USA)

10 Observatory Hill Drive, Petit Jean

Harvard/MPC H43 (Conway)

Harvard/MPC H41 (Petit Jean Mountain)

drclay@arksky.org


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