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Messier M101

Object Information Messier object: M101 Common name for Messier object: Pinwheel Galaxy NGC (New General Catalog) number: NGC 5457 Discription: Spiral Galaxy Located in constellation: Ursa Major Right ascension in hours minutes: 14:03.2 Declination in degrees minutes: 54:21 Visual magnitude: 7.9 Size: 22.0 arc minutes Image size: 55.23 arc minutes high by 40.98 arc minutes wide Image orientation: North is top, East is left Detailed discription of M101 in SEDS Messier database Other Messier galleries, images or catalogs

Observing Log
Date of observation: September 12, 1998
Time at end of first CCD image 21:39 PDT
Time at end of last CCD image 21:57 PDT
Observing Location: At home on the drive way
Observation of object:
 
Sky Conditions
Sky transparency: 5.6 - 4.9 high clouds at 1:00, (Magnitude of the faintest star visible with the unaided eye in Ursa Minor)
Moon rise at 23:52 PDT on September 12, 1998
Astronomical twilight ends in the evening at 21:07 PDT on September 12, 1998
Astronomical twilight starts in morning at 5:01 PDT on September 13, 1998
 
Observing Equipment
80 mm aperture refractor telescope and CCD Cookbook Camera
CCD image time: Five 240 seconds images added together
CCD dark calibration frames: 20 - 240 seconds dark frames
Notes: CB245 camera dew with water all over it. There may be water marks on the camera window on some of the images.

© 1998-2003 David Haworth