100% mobile compatible
Observatory Parameters
Jan 18
Lat. 39.0, Lon. -77.5
Clouds: Seeing:
Waxing Crescent
08:22 18:53

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 jramper
Size: 960 × 810 px
Visual Field: 0.7º
Uploaded by jramper
Size: 2,445 × 2,063 px
Visual Field: 0.7º
Uploaded by Ron_Kramer MI, United States
Size: 3,555 × 2,265 px
Visual Field: 1.3º
Uploaded by MR_IR_AP Žilinský kraj, Slovakia
Size: 1,280 × 866 px
Visual Field: 0.8º
ISO: 1,600
Uploaded by Kenn CA, United States
Size: 3,324 × 2,487 px
Visual Field: 0.9º
Uploaded by wannaberocker
Size: 5,454 × 3,555 px
Visual Field: 1.6º

Build and share your astrophotographer profile for free!

Upload Your Astrophotography
View all...

Telescope Simulator

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

This tool was designed to check framing, not visual magnitude. Objects will look dimmer on your eyepiece and binoculars.

Camera Eyepiece Binoculars Off

Hourly Elevation Jan 18

Open Cluster M 21 as seen from Lat. 39.0, Lon. -77.5
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

“The Universe is not fair and it is never going to be fair.” Daniel Keys Moran
Astronomy Planning Made Easy. Learn more.