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Imaging session was at Full Moon , with ST7 CCD camera on a temporarily mounted 8", f/10 SCT telescope. Despite the moon light causing typical sky background of around 3 to 6 ADU/sec/sq.arc sec (compared to non-Moon sky background values of around 0.6 to 1) reasonable detail was observable in galaxies down to mag +14 to +15.
Initial polar alignment error was 1.1 deg in azimuth and
0.15 deg in altitude, as determined by TPoint. After jogging the scope using new
script routine and then re-centering by adjusting the mount's pointing the polar
alignment error was reduced to 0.3 deg in azimuth and 0.15 deg in
altitude. This allowed images of 30 sec exposures to be taken without any
trailing.
[ Goto Notes from Session S00054 (2003-11-21)
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M108 (Ursa Major) |
CCD Image, 5 x 30 sec exposure (summed) 2003-12-08 00:34 to 00:40h UT (#55260-69) 11.6 x 7.8 arc sec |
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M109 (Ursa Major) |
CCD Image, 5 x 30 sec exposure (summed) 2003-12-08 00:43 to 00:46h UT (#55271-75) 11.6 x 7.8 arc sec |
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NGC 3953 (Ursa Major) (catalog mag +10.8) |
CCD Image, 6 x 30 sec exposure (summed) 2003-12-08 00:49 to 00:53h UT (#55279-84) |
Negative |
CCD Image as above |
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NGC 7197 (Lacerta) |
CCD Image, 10 x 20 sec exposure (median) 2003-12-07 23:39 to 23:45h UT (#55208-17) |
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M31 (Andromeda) |
CCD Image, 3x30 sec exposure (median) 2003-12-07 23:50 to 23:52 h UT (#55222-24) 11.6 x 7.8 arc sec |
NGC 206 in M31 (Andromeda) |
CCD Image, 6x30 sec exposure (median) 2003-12-07 23:53 to 23:56 h UT (#55225-30) 11.6 x 7.8 arc sec |
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Satellite or plane ? (Pegasus). Altitude 54.3 deg |
CCD Image, 20s exposure 2003-12-07 20:54h UT (#55055) |
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Light Survey showed that sky was about 7 times brighter (with Full Moon) compared to the dark skies at an earlier observing session on 2003-10-17 (with no moon)
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This Web Page: | CCD Images - Session 55 (2003-12-07) |
Last Updated : | 2020-11-18 |
Site Owner : | David Richards |
Home Page : | David's Astronomy Web Site |