| | Globular Cluster | M3 | Messier 3 | NGC 5272 | | With 500,000 stars, at 180 light years diameter, this is one of the biggest and brightest globular clusters. Its brightest stars are mV 12.7, and its overall spectral type is F2 (yellow-white), with a secondary population of blue stars. At Class VI, its core is of medium density. The brightest 25 stars average 14.2 mV. | | |
| Details: | | Night of: | Thursday February 11, 2016 | Site: | Laguna Niguel | Local Time: | 1:15 AM | Feb 11, 2016 | Altitude: | 55° | | RA: | 13h 42m 12s | Declination: | +28d 23' | | Distance: | 33,900 light years | Magnitude: | +6.2 mV | Size: | 18' |
| | Camera Settings: | | Telescope: | 9.25-SCT | Camera: | Celestron NightScape + f/6.3 Reducer | f/ratio: | f/6.3 | Pixel Scale: | 1.45 arcsec | Image Size: | 1078 x 947 pixels (1.0 MP) | | 26.1' x 22.9' | Exposure: | 15 sec | |
Stacked Frames: | 80 | Total Integration: | 20 minutes | | Post Processing: | processed using flats |
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