Messier 21 (M 21)

Introduction | Map | My Own Photos | My Own Observations | References

On this page I collect my observations of the open star cluster M 21 in the constellation Sagittarius.

 

Introduction

The open star cluster M 21 is located in the constellation Sagittarius and is, according to Stoyan, often given little attention to. To him, it is attractive, because it can be observed with the telescope with M 20 (Trifid Nebula) in the same field of view.

Size: 7' (Stoyan)
Distance: 4,000 light years (Stoyan)
Rating: * (Stoyan)

 

Map

M 21 in the constellation Sagittarius and in the context of other nearby DSO; M 20 is directly below it, and both can be observed together in a telescope. (Image Courtesy of SkySafari Astronomy, www.simulationcurriculum.com)

 

My Own Photos

          

M 21 - May 29, 2020, disturbed

 

M 21 - Aug 23, 2020

 

M 21 - Aug 23, 2020, photo left processed

 

My Own Observations

Observations September/October 2019

Observations May to August 2020

 

References

On this Site