Celebrating the Beauty of the Night Sky
MN
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.


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All Images of Globular Cluster
24 Nov 2017

24 Nov 2017

09 Jun 2016

01 Nov 2013

05 Oct 2013

20 Sep 2009

Details:
Night of:Saturday September 19, 2009
Site:Joshua Tree
Local Time:1:00 AM | Sep 20, 2009
Altitude:50°
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 + f/3.3 Reducer
f/ratio:f/3.3
Pixel Scale:2.08 arcsec
Image Size:771 x 571 pixels (0.4 MP)
26.7' x 19.8'
Exposure:15 sec
Stacked Frames:11
Total Integration:3 minutes
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