Messier M1


Messier Object Information

Messier object: M1
Common name for Messier object: Crab Nebula
NGC (New General Catalog) number: NGC 1952
Discription: Supernova remnant and emission nebula
Located in constellation: Taurus
Right ascension in hours:minutes: 5:34.5
Declination in degrees:minutes: 22:01

Visual magnitude: 8.4, 8
Size: 6 x 4 arc minutes
Image size: 31 arc minutes high by 41 arc minutes wide
Image orientation: North is left, West is top, East is bottom and South is right
Detailed discription of M1 in SEDS Messier database
Other Messier galleries, images or catalogs

Observing Log
Date of observation: September 24, 2000
Time at end of first CCD image 3:11 PDT
Time at end of last CCD image 3:16 PDT
Observing Location: At home on the drive way
Observation of object: M1 is an elliptical shape cloud of gas with bright patches.
Sky Conditions
Moon rise at 2:57 PDT on September 24, 1998
Astronomical twilight ends in the evening at 20:46 PDT on September 23, 1998
Astronomical twilight starts in morning at 5:19 PDT on September 24, 1998
Observing Equipment

Celestron C-8 Schmidt-Cassegrain telescope with Fastar lens accessory and SBIG ST-237 CCD Camera
CCD image time: 8 - 30 seconds images stacked together
CCD dark calibration frame: 84 - 30 seconds dark frames
CCD bias calibration frame: 40 - 0 seconds bias frames
CCD flat calibration frame: 8 - 30 seconds flats frames at twilight (5:48 PDT)

M1 image taken with Orion ShortTube 80 mm refractor telescope and Cookbook CB245 CCD Camera.

Use Test patterns to calibrate monitor brightness, contrast, height and width