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Object |
Spiral Galaxy “The Pinwheel
Galaxy” (M101), in Ursa Major |
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Telescope (Photo) |
Celestron 8" SCT OTA @ f/6.3
on Losmandy G11 Mount |
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Telescope (Guiding) |
Televue 85mm refractor @ f/5.6 on Losmandy
G11 Mount |
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Camera (Photo) |
Canon 20Da DSLR |
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Camera (Guiding) |
Meade DSI Pro II w/PHD
Guiding
|
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Exposure Detail |
Excluded-Average combination of
20 images at 300 seconds each, ISO1600; RAW file conversion, full
calibration (bias, flat, dark, and flat dark), and initial image processing
using ImagesPlus 3.75; final image processing using Photoshop
CS3 |
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Location |
Private Property at
Chiefland Astronomy Village, Florida
(N29.406, W82.860) |
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Date |
03/21/09 |
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Comments |
M102 is the same object as
M101, which occurred through an error
in the original Messier cataloging. However, spiral galaxy
NGC5866
is believed by some astronomers to be the "real" M102. Due to a
recording error by Charles Messier, M102's position remains
unclear and astronomers generally believe M102 to be a duplicate
observation of
M101. However, if the
recording error is rationalized,
NGC5866 can be found in the
position perhaps intended originally by Messier. |
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