Celebrating the Beauty of the Night Sky
MN
Messier 4 Globular Cluster
M4 | Messier 4 | NGC 6121
M4 is the only globular that Messier himself saw resolved into stars. This is one of the closest globulars, and its brighter stars are about 10.8 mV. It is about 70 light years across. At Class IX this is a loosely packed globular. With less than 20,000 stars it's one of the least populated globs.


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All Images of Messier 4 Globular Cluster
27 May 2019

23 Jul 2014

Details:
Night of:Friday May 24, 2019
Site:Laguna Niguel
Local Time:11:30 PM | May 27, 2019
Altitude:28
RA:16h 23m 35s
Declination:-26d 32'
Distance:7,200 light years
Magnitude:+5.9 mV
Size:26'
Camera Settings:
Telescope:2.4in-ZWO
Camera:ZWO ASI224 +2.5x
f/ratio:f/11.5
Pixel Scale:1.1 arcsec
Image Size:951 x 1248 pixels (1.2 MP)
17.4' x 22.9'
Exposure:5 sec
Gain:350
Video Length:?
Stacked Frames:50
Total Integration:4 minutes
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