LtE in CMO #254

From   Edward Arnold GRAFTON

@. . . . . . A cold front moved through Houston Texas on the 24th and cleared the skies.

I was very surprised to see that the seeing was good only 24 hrs later, quite unusual for my location. The temperature was a little cool, in the mid 50's F in the early mourning hours.

 

 Jupiter images : November 11-25-2001 at 8:57 and 9:18 UT

 

 http://www.egrafton.com/11-25-01.jpg

 

 Ed Grafton, Houston Texas, ST6 CCD medium resolution mode 14 inch f/11 Celestron SCT

 

>   Eyepiece Projection @ f/68 w/10mm plössel, projected 70mm, aprox. .23 arc seconds per pixel

>

>                Integration Times for the 8:57 image

>

>                3 BLUE + IR rejection, .6 seconds, Edmunds filters

>                3 GREEN + IR rejection, .6 seconds, Edmunds filters

>                3 RED  + IR rejection, .6 seconds, Edmunds filters

>                6 IR blocker only      .3 seconds, Edmunds IR Blocker

>

>                 Integration Times for the 9:18 image

>

>                3 BLUE  + IR rejection, .6  seconds, Edmunds filters

>                3 GREEN + IR rejection, .6  seconds, Edmunds filters

>                3 RED  + IR rejection, .6  seconds, Edmunds filters

>                7 IR blocker only      .3 seconds, Edmunds IR Blocker

>

>Seeing was average to good 6-7/10. Transparency was excellent 9/10, wind

>calm, no dew. The shadow is from the moon Europa.

                       (25 November 2001 email)

 

 

@ . . . . . .The sky was partly cloudy on 12-08-2001 in Houston Texas. The partly cloudy sky was an improvement over recent days. There were too many clouds to get color shots so here are the B&W images.

 

Jupiter images :  12-08-2001 at 7:48 and 8:41 UT

 

 http://www.egrafton.com/12-08-01.jpg

 

 Ed Grafton, Houston Texas, ST6 CCD medium resolution mode 14 inch f/11 Celestron SCT

>        Eyepiece Projection @ f/68 w/10mm plössel, projected 70mm, aprox.

>.23 arc seconds per  pixel.

 

>Integration Times for the 7:48 image

>

>                6 IR blocker only, .3 seconds, Edmunds IR Blocker

>

>Integration Times for the 8:41 image

>

>                5 IR blocker only, .3 seconds, Edmunds IR Blocker

>Seeing was average 5/10. Transparency was variable 0-8/10, mid level cloud

>with a 50% coverage and high level clouds with a 80% coverage. Wind light at

>3 MPH, heavy dew.

                        (8 December 2001 email)

 

 

@ . . . . . . The sky settled somewhat over Houston 12-19. It was only hours before the next cold front moved through. This seems to be a trend, cold fronts moving through and the sky is turbulent but settles just before the next front. The temperature was cool, in the mid 50's F. There are many interesting features that are in this image, many seem to be new from the last couple of weeks.

 Many white ovals in the S.Temp.Z.

 

Jupiter images : December 19th 2001 at 06:28 UT

 

 http://www.egrafton.com/12-19-01.jpg

 

 Ed Grafton, Houston Texas, ST6 CCD medium resolution mode 14 inch  f/11 Celestron SCT

>        Eyepiece Projection @ f/68 w/10mm plössel, projected 70mm, aprox.

>.23 arc seconds per  pixel.              

 

>        Image data:

>

>                1 BLUE  + IR rejection, .6  seconds, Edmunds filters

>                1 GREEN + IR rejection, .6  seconds, Edmunds filters

>                1 RED  + IR rejection, .6  seconds, Edmunds filters

>                6 IR bloocker only      .3 seconds, Edmunds IR Blocker

>

>        The sky was very transparent, 9/10 except for some cirrus patches

>that were drifting through. The seeing was very good 7/10 with only light

>dew. A light SW wind at 3 MPH.

(20 December 2001 email)

 

@ . . . . . .The atmosphere in Houston was rather unusual on the 21st as it was very　transparent and steady also. The temperature was cool, in the low 50's F.　Lots of complex features are visible at this CM.

 

Jupiter images : December 21th 2001 at 06:25 UT

 

 http://www.egrafton.com/12-21-01.jpg

 

        Ed Grafton, Houston Texas, ST6 CCD medium resolution mode 14 inch f/11 Celestron SCT

 

>        Eyepiece Projection @ f/68 w/10mm plössel, projected 70mm, aprox.

>.23 arc seconds per pixel.                 

>        Image data:

>

>                2 BLUE  + IR rejection, .6  seconds, Edmunds filters

>                1 GREEN + IR rejection, .6  seconds, Edmunds filters

>                2 RED  + IR rejection, .6  seconds, Edmunds filters

>                4 IR blocker only      .3 seconds, Edmunds IR Blocker

>

>        The sky was very transparent, 9/10. The seeing was very good to

>excellent 8/10 with only light dew. The wind was calm.

(21 December 2001 email)

 Ed GRAFTON (Houston, Texas, USA)

egrafton@ghgcorp.com

 Back to the LtE Home Page

 Jump to the LtE Archives