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Observatory Parameters
Apr 20
Lat. 39.1, Lon. -77.6
Clouds: Seeing:
Waxing Crescent
10:07 00:00

Open Cluster M 21 Open Cluster in Sagittarius Constellation

Size: 16' Magnitude: 5.9 Also known as NGC 6531, ESO 521-SC19, OCL 26
Uploaded by Marcelo Alves
Size: 3,876 × 3,039 px
Visual Field: 2.5º
Uploaded by ricktobey Texas, United States
Size: 3,352 × 2,532 px
Visual Field: 1.5º
Uploaded by Jeff_Lusher
Size: 2,307 × 1,729 px
Visual Field: 1.9º
Uploaded by Jeff_Lusher
Size: 3,696 × 3,982 px
Visual Field: 1.6º
Uploaded by jramper
Size: 960 × 810 px
Visual Field: 0.7º
Uploaded by jramper
Size: 2,445 × 2,063 px
Visual Field: 0.7º

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Telescope Simulator

Check how Open Cluster M 21 would look like through your camera, eyepiece or binoculars.

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Hourly Elevation Apr 20

Open Cluster M 21 as seen from Lat. 39.1, Lon. -77.6
Maximum Elevation º at hrs.
Rise: hrs.   Set: hrs.

Monthly Elevation

Best period for observing Open Cluster M 21 at hours

Data Sheet

18h 04m 13s
-22º 30' 00''
I3m -
Last visited objects: M 21

Astronomy Quote of the Day

“Since I have introduced this term I had always a bad conscience... I cannot help to feel it strongly and I am unable to believe that such an ugly thing should be realized in nature.” Albert Einstein, regards his objections to a cosmological constant, 1947
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