| | Globular Cluster | M15 | Messier 15 | NGC 7078 | | M15, at Class IV, is one of the most densely-packed globular clusters, and one of the few known to contain a planetary nebula (Pease 1 or K 848, 15.5 mV and 3' diameter). With over 100,000 stars, this cluster is 175 light years in diameter. It is thought to contain a black hole at its core. Half the cluster's mass is concentrated within the central 1.06'. The brightest stars are 12.6 mV. | | |
| Details: | | Night of: | Saturday October 5, 2013 | Site: | Laguna Niguel | Local Time: | 10:00 PM | Oct 5, 2013 | Altitude: | 65° | | RA: | 21h 29m 58s | Declination: | +12d 10' | | Distance: | 33,600 light years | Magnitude: | +6.2 mV | Size: | 18' |
| | Camera Settings: | | Telescope: | 9.25-SCT | Camera: | Orion Starshoot DSI2 + 0.5x Reducer | f/ratio: | f/5 | Pixel Scale: | 1.49 arcsec | Image Size: | 751 x 571 pixels (0.4 MP) | | 18.6' x 14.2' | Exposure: | 5 sec | |
Stacked Frames: | 80 | Total Integration: | 7 minutes |
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