LtE in CMO #276

From Edward Arnold GRAFTON

® . . . . . . . .Date: Sun, 27 July 2003 09:11:59 -0500 (CDT)

Subject: Mars Observation July 27th 2003

Hi Mars Observers

Here is an image from July 27th 2003. The sky was clear, transparency was fair to good 6/10 and seeing was very good to excellent 8-9/10.

C14 @ f/39, ST5 CCD

Image at: http://www.egrafton.com/m7-27-03.jpg

RED + IR rejection, .3 seconds, SBIG filter

GREEN + IR rejection, .6 seconds, SBIG filter

BLUE + IR rejection, 1. second, SBIG filter

Luminance, IR + Red , 600-1000nm .09 seconds, Edmunds filter

® . . . . . . . .Date: Tue, 29 July 2003 07:36:12 -0500 (CDT)

Subject: Mars Observation July 29th 2003 09:34 UT

Hi Mars Observers

Here is an image from July 29th 2003. The sky was partly cloudy, transparency was fair to good 6/10 and seeing was very good 8/10.

C14 @ f/39, ST5 CCD

Image at: http://www.egrafton.com/m7-29-03.jpg

RED + IR rejection, .3 seconds, SBIG filter

GREEN + IR rejection, .6 seconds, SBIG filter

BLUE + IR rejection, 1. second, SBIG filter

Luminance, IR + Red , 600-1000nm .08 seconds, Edmunds filter

® . . . . . . . .Date: Wed, 30 July 2003 08:25:25 -0500 (CDT)

Subject: Mars Observation July 30th 2003 09:29 UT

Hi Mars Observers

Here is an image from July 30th 2003. Looks like the melting of the SPC has spawned clouds in Chryse that were not there only yesterday. Had to switch to my Edmund filters after rapid deterioration of the SBIG filter set that I had been using.

The sky was partly cloudy, transparency was very good 8/10 and seeing was fair to good 5-6/10.

C14 @ f/39, ST5 CCD

Image at: http://www.egrafton.com/m7-30-03.jpg

RED + IR rejection, .3 seconds, Edmund filter

GREEN + IR rejection, .5 seconds, Edmund filter

BLUE + IR rejection, 1. second, Edmund filter

Luminance, IR + Red , 600-1000nm .06 seconds, Edmunds filter

® . . . . . . . .Date: Thu, 31 July 2003 08:47:08 -0500 (CDT)

Subject: Mars Observation July 31st 2003 08:44 UT

Hi Mars Observers

Here is an image from July 31st 2003. The dust area does not look as concentrated as yesterday although perhaps broader. Another concentrated core looks to be present around Aurorae Sinus. The sky transparency was very good 8/10 and seeing good 7/10.

C14 @ f/39, ST5 CCD

Image at: http://www.egrafton.com/m7-31-03.jpg

RED + IR rejection, .25 seconds, Edmund filter

GREEN + IR rejection, .5 seconds, Edmund filter

BLUE + IR rejection, .8 second, Edmund filter

Luminance, IR + Red , 600-1000nm .07 seconds, Edmunds filter

® . . . . . . . .Date: Fri, 1 Aug 2003 08:50:13 -0500 (CDT)

Subject: Mars Observation August 1st 2003 08:58 UT

Hi Mars Observers

Here is an image from August 1st 2003 at 08:58 UT. The dust area does not look to have changed much during the last day at least from this perspective. There is a somewhat low contrast (dust cloud? )feature that has shown up in Mare Erythraeum but does not appear very concentrated. The sky transparency was very good 8/10 and seeing good 7/10.

C14 @ f/39, ST5 CCD

Image at: http://www.egrafton.com/m8-01-03.jpg

RED + IR rejection, .25 seconds, Edmund filter

GREEN + IR rejection, .5 seconds, Edmund filter

BLUE + IR rejection, .8 second, Edmund filter

Luminance, IR + Red , 600-1000nm .07 seconds, Edmunds filter

® . . . . . . . .Date: Sat, 2 Aug 2003 08:22:48 -0500 (CDT)

Subject: Mars Observation August 2nd 2003 08:42 UT

Hi Mars Observers

Here is an image from August 2nd 2003 at 08:42 UT. No new dust activity observed from this perspective. The sky transparency was very good 8/10 and seeing was very good 7/10.

C14 @ f/39, ST5 CCD

Image at: http://www.egrafton.com/m8-01-03.jpg

RED + IR rejection, .25 seconds, Edmund filter

GREEN + IR rejection, .5 seconds, Edmund filter

BLUE + IR rejection, .8 second, Edmund filter

Luminance, IR + Red , 600-1000nm .07 seconds, Edmunds filter

Ed GRAFTON (Houston, Texas, USA)

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