Celebrating the Beauty of the Night Sky
MN
Globular Cluster
M22 | Messier 22 | NGC 6656
M22 is one of the brightest globulars, and only M4 is closer to Earth. It is about 100 light years in size, and contains over 83,000 stars as bright as 11th magnitude. There are at least 2 black holes at its core. M22 is one of only 4 globulars to have a planetary nebula. GJJC1 or IRAS 18333-2357 is 3' diameter but only 1' south of the core, and is very difficult to spot. Its density class is VII.


Viewing at 100%

All Images of Globular Cluster
26 Sep 2014

Details:
Night of:Friday September 26, 2014
Site:Palomar Mountain
Local Time:8:45 PM | Sep 26, 2014
Altitude:30°
RA:18h 36m 24s
Declination:-23d 54'
Distance:10,600 light years
Magnitude:+5.1 mV
Size:32'
Camera Settings:
Telescope:9.25-SCT
Camera:Orion Starshoot DSI2 + 0.5x Reducer
f/ratio:f/5
Pixel Scale:1.49 arcsec
Image Size:772 x 560 pixels (0.4 MP)
19.2' x 13.9'
Exposure:15 sec
Stacked Frames:63
Total Integration:16 minutes
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