A2 LINEAR - July 22, 2001 UT
images on this page are processed from this image which is the result
of combining six 60-second exposures together using MaxIM DL software,
and converting the original FITS format to a JPEG file for presentation
on this web page.
histogram stretching and a ranking process included in AIP4Win software,
the faint tail begins to appear along with some very low-contrast
the ranking process a second time, the "T" structure composed
of the tail and apparently two jets emanating from the nucleus of
the comet now come dimly into view.
"topographic" lighting feature places a virtual light
source 45 degrees counter clock wise from North (top of image) and
30 degrees up from the level of the image to produce this representation
which clearly shows the "T" structure
first observed by Gianluca Masi on July 13.
of the six original images: (earliest image  is represented by star
at the right in the line of six stars.) The comet's motion is parallel
to the line of stars, moving north west, towards the upper right on
- 2001 07 22.439 UT - exposure time 60 seconds - unfiltered
- 2001 07 22.441 UT - exposure time 60 seconds - unfiltered
- 2001 07 22.443 UT - exposure time 60 seconds - unfiltered
- 2001 07 22.444 UT - exposure time 60 seconds - unfiltered
- 2001 07 22.445 UT - exposure time 60 seconds - unfiltered
- 2001 07 22.450 UT - exposure time 60 seconds - unfiltered
Elapsed time from start of exposure #1 to end of #6 - 16m 09s
More of the "T" structure is visible on SRO images
taken one week ago.
The results displayed
here are produced from original images acquires with an SBIG ST6 CCD
camera at the 0.76-m f/6 Newtonian telescope
using CCDSoft and processed using AIP4Win, MaxIM DL and PhotoShop software.
At the telescope:
Steve Brewster, Sara Martin,
Ted Nichols II, John Rogers, and Pam Sable.