Celebrating the Beauty of the Night Sky
MN
Ring Nebula
M57 | Messier 57 | NGC 6720
This distinctive planetary nebula is expanding about 1 arcsecond per century, suggesting it was ejected from its mag 15 central star about 400 AD. To its upper right is the mag 14 galaxy IC-1296.


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All Images of Ring Nebula
12 Jul 2015

11 Sep 2010

18 Sep 2009

28 Jun 2009

19 Jun 2004

Details:
Night of:Friday September 18, 2009
Site:Joshua Tree
Local Time:9:45 PM | Sep 18, 2009
Altitude:60°
RA:18h 53m 35s
Declination:+33d 01' 45"
Distance:2,300 light years
Magnitude:+8.8 mV
Size:1.5' x 1.0'
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:753 x 544 pixels (0.4 MP)
26.1' x 18.9'
Exposure:30 sec
Stacked Frames:7
Total Integration:4 minutes
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