Messier M40

Object Information
Messier object: M40
Common name for Messier object: Winnecke 4
NGC (New General Catalog) number: None
Discription: Binary star
Located in constellation: Ursa Major
Right ascension in hours minutes: 12:22.4
Declination in degrees minutes: 58:05
Visual magnitude: 8.4
Size: 0.8 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 M40 in SEDS Messier database
Other Messier galleries, images or catalogs

Observing Log
Date of observation: August 30, 1998
Time at end of CCD image 22:05 PDT
Observing Location: At home on the drive way
Observation of object: M40 is a double star. NGC 4290 and NGC 4284 are located to the west of M40. A very bright star is located in the southwest part of the above image.
Sky Conditions
Sky transparency: 4.9 (Magnitude of the faintest star visible with the unaided eye in Ursa Minor)
Moon rise at 14:46 PDT on August 30, 1998
Astronomical twilight ends in the evening at 21:36 PDT on August 30, 1998
Astronomical twilight starts in morning at 4:41 PDT on August 31, 1998
Observing Equipment
80 mm aperture refractor telescope and CCD Cookbook Camera
CCD image time: 1 - 120 seconds image
CCD dark calibration frames: 12 - 120 seconds dark frames

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