Brian McCandless,
Grand View Observatory, Elkton, Maryland
Celestron CGE 1400
and SBIG SGS with ST8-XME
ST-8 XME Tracking
CCD
10 sec exposure
3900 A
ST-8 XME Imaging CCD
(raw minus dark frame)
800 sec exposure, 1x4
binning, 150 lines/mm grating, 18 micron slit, 4.3 A/pixel
7250 A
Slit aligned on nucleus here
for spectral acquisition
Field stars
Note: dense lobe at edge
due to SGS artifact
28 October 2007, 4h 59m UT
Uncorrected JD = 2454402.7075
28 October
2007, 4h 45m UT
~350 arcsec
(5.8 arcmin)
E
N
Approximate position:
RA: 3h 50m
Dec: +50° 20’
Comet 17P/Holmes: 28 Oct 07 EDT