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Notes from CCD Session Pluto M11 - Open Cluster M26 - Open Cluster M10 - Globular Cluster M12 - Globular Cluster M14 - Globular Cluster Exposure Time/ Magnitude reach
Sky transparency was poor, with conditions unsuitable for deep sky imaging. The session of concentrated on imaging Pluto and a number of Messier clusters. 99 CCD images were taken over a period of 1.6 hours.
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Pluto (moving through Ophiuchus) |
Animated sequence of
CCD images taking over 3 days. Motion recorded as 0.83 arc min per day. 2003-08-02 to 2003-08-05 8.5 x 6.7 arc mins |
Pluto (marked with cross-hair) |
CCD images, 7 x 20s (median combine) 2003-08-05 21:30 to 21:33h UT (#49009-15) 11.4 x 7.6 arc mins |
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M11 (Scutum) |
CCD image, 6 x 10 sec exposures (median combine) 2003-08-05 21:46 h UT (#49032-49037) 11.4 x 7.6 arc mins |
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M26 (Scutum) |
CCD image, 5 x 20 sec exposures (top - median combine bottom - summed combine) 2003-08-05 21:57 to 21:59 h UT (#49049-49053) 11.4 x 7.6 arc mins |
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M10 (Ophiuchus) |
CCD image, 3 x 10 sec exposures (summed) 2003-08-05 22:12 h UT (#49065-67) 11.4 x 7.6 arc mins |
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M12 (Ophiuchus) |
CCD image, 4 x 10 sec exposures (summed) 2003-08-05 22:19 h UT (#49069-72) 11.4 x 7.6 arc mins |
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M14 (Ophiuchus) |
CCD image, 2 x 20 sec exposures (summed) 2003-08-05 22:04 to 22:05 h UT (#49061-62) 11.4 x 7.6 arc mins |
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Effect of increasing exposure time on magnitude reach |
Consecutive CCD images (star field in Milky Way in Cygnus) 2003-08-05 (#49087-8), 5.2 x 7.6 arc mins The 10 sec exposure reaches to +12.3 whilst the 40 sec exposure reaches to 13.5 |
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This Web Page: | CCD Images - Session 49 (2003-08-05) |
Last Updated : | 2015-05-16 |
Site Owner : | David Richards |
Home Page : | David's Astronomy Web Site |