Messier M13


Object Information
Messier object: M13
Common name for Messier object: Hercules Globular Cluster
NGC (New General Catalog) number: NGC 6205
Discription: Globular Cluster
Located in constellation: Hercules
Right ascension in hours minutes: 16:41.7
Declination in degrees minutes: 36:28
Visual magnitude: 5.8
Size: 16.6 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 M13 in SEDS Messier database
Other Messier galleries, images or catalogs

Observing Log
Date of observation: September 11, 1998
Time at end of first CCD image 21:55 PDT
Time at end of last CCD image 22:13 PDT
Observing Location: At home on the drive way
Observation of object: M13 is a extermely large bright and round globular cluster with some stars resolved to the center and it has a bright round core.
Sky Conditions
Sky transparency: 5.6 - 5.0 (Magnitude of the faintest star visible with the unaided eye in Ursa Minor)
Moon rise at 23:06 PDT on September 11, 1998
Astronomical twilight ends in the evening at 21:10 PDT on September 11, 1998
Astronomical twilight starts in morning at 5:00 PDT on September 11, 1998
Observing Equipment
80 mm aperture refractor telescope and CCD Cookbook Camera
CCD image time: 5 - 240 seconds images added together
CCD dark calibration frames: 18 - 240 seconds dark frames
Notes: Off center to the east because of a bright star to the east that causes star blooming.

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