LtE in CMO #274

From Edward Arnold GRAFTON

® . . . . . .Date: Sat, 28 June 2003 08:36:19 -0500 (CDT)

Subject: Mars Observation June 28th at 09:25 UT

Hi Mars Observers

Here is an image from June 28th 2003 at 09:25 UT taken from Houston, Texas.

The sky transparency was fair, 5/10 with cirrus clouds and the seeing was good, 7/10. The temperature was in the upper 70s F with moderate dew present and calm winds.

C14 @ f/27, ST5 CCD

Image at: http://www.egrafton.com/m6-28-03.jpg

RED + IR rejection, .15 seconds, SBIG filter

GREEN + IR rejection, .3 seconds, SBIG filter

BLUE + IR rejection, .5 seconds, SBIG filter

Luminance, IR only, 700-1000nm .15 seconds, Edmunds filter

® . . . . . .Date: Wed, 2 July 2003 07:20:59 -0500 (CDT)

Subject: Mars Observation July 2nd at 09:43 UT

Hi Mars Observers

Here is an image from July 02th 2003 at 09:43 UT taken from Houston, Texas.

Dust activity noted by D. Parker and J. Beish on July 1st seems to be prominent in the area of Iapygia on the Northern rim of Hellas. The sky was mostly cloudy with only a few short gaps in the clouds where a few frames could be captured.

C14 @ f/27, ST5 CCD

Image at: http://www.egrafton.com/m7-02-03.jpg

Luminance, IR only, 700-1000nm .12 seconds, Edmunds filter

® . . . . . .Date: Thu, 3 July 2003 12:30:39 -0500 (CDT)

Subject: Mars Observation July 3rd at 09:46 UT

Hi Mars Observers

The Dust Cloud has expanded South and now obscures the southern part of Hellas. Other changes since July 2nd are also present. The western end of Sinus Sabaeus and Mare Serpentis have bright cores present. Another bright core has appeared near the eastern rim of the SPC.

The sky was mostly clear with only a few clouds in the clouds. The transparency was very good 8/10 and the seeing was good to excellent 8-9/10.

C14 @ f/27, ST5 CCD

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

RED + IR rejection, .15 seconds, SBIG filter

GREEN + IR rejection, .3 seconds, SBIG filter

BLUE + IR rejection, .5 seconds, SBIG filter

Luminance, IR only, 700-1000nm .12 seconds, Edmunds filter

® . . . . . .Date: Sun, 6 July 2003 07:43:43 -0500 (CDT)

Subject: Mars Observation July 6th at 10:54 UT

Hi Mars Observers

The dust activity seems to be most intense on the northeastern segment of the Hellas basin, somewhat less intense over Mare Hadriacum and Iapygia.

Sky: The clouds parted somewhat right before dawn allowing for an image of the dust area. The sky was mostly cloudy with only a few breaks at the low level and cirrus at higher levels. The transparency was poor 3/10 and the seeing was fair to good 6/10.

C14 @ f/27, ST5 CCD

Image at: http://www.egrafton.com/m7-06-03.jpg

RED + IR rejection, .15 seconds, SBIG filter

GREEN + IR rejection, .3 seconds, SBIG filter

BLUE + IR rejection, .5 seconds, SBIG filter

Luminance, IR only, 700-1000nm .12 seconds, Edmunds filter

® . . . . . .Date: Tue, 8 July 2003 09:45:56 -0500 (CDT)

Subject: Mars Observation July 8th

Hi Mars Observers

After a heavy rain in the early evening the sky cleared nicely this am in Houston. The Transparency was excellent 9/10 and the seeing was very good 8/10. Heavy dew and calm winds.

C14 @ f/27, ST5 CCD

Image at: http://www.egrafton.com/m7-08-03.jpg

RED + IR rejection, .15 seconds, SBIG filter

GREEN + IR rejection, .3 seconds, SBIG filter

BLUE + IR rejection, .5 seconds, SBIG filter

Luminance, IR only, 700-1000nm .10 seconds, Edmunds filter

® . . . . . .Date: Wed, 9 July 2003 08:36:35 -0500 (CDT)

Subject: Mars Observation July 9th at 9:07 UT

Hi Mars Observers

Here is an image from July 9th at 09:07 UT. The sky was partly cloudy with an approaching thunderstorm. Seeing and transparency were good 8/10.

C14 @ f/27, ST5 CCD

Image at: http://www.egrafton.com/07-09-03.jpg