Messier 92 (M 92)

Introduction | Map | Find/Identify | Sketch | My Best Own Photos | My Own Observations | References || Appendix: My Own Photos

On this page I collect my observations of the globular star cluster M 92 in the constellation Hercules.

 

Introduction

The globular star cluster M 92 in the Hercules constellation is somewhat smaller (depending on the author, it is 7 'or 8' in size) than its more familiar "brethren" M 13. It is located above the Keystone asterism, the most prominent part of the constellation and more difficult to find than M 13. I was able to clearly see the bright nucleus (M 92 appears somewhat more concentrated at the center than M 13), but not dissolve single stars - until August 23, 2019, on which I suceeded using averted vision (and maybe also with direct vision...) for the first time. In my binoculars, M 92 appears also very small.

Size: 7' / 8' (Stoyan/Karkoschka)
Distance: 25,000 light years (Stoyan)
Rating: *** (Stoyan)

 

Map

The globular star cluster M 92 is located above the Keystone asterism and a little more difficult to find than M 13. First find the Keystone asterism! (Image Courtesy of SkySafari Astronomy, www.simulationcurriculum.com)

 

Find/Identify

Find: The globular star cluster M 92 in the constellation Hercules is located above the Keystone asterism and hard to find for me because there are no stars that can be used for orientation:

I therefore try to start from the two upper Keystone stars and form a kind of triangle with them to find M 92, which is generally quite tedious. Another approach is, to go up again about the height of the keystone trapezoid and then go 1/3 of the upper side to the right.

Identify: If you found a globular cluster in this way, then M 92 is already identified! (Image Courtesy of SkySafari Astronomy, www.simulationcurriculum.com)

 

Sketch

The sketch by Michael Vlasov (DeepSkyWatch.com) provides a rough impression of what I observed in Summer/Autumn 2016 (my impression was much fainter and smaller than the sketch):

Sketch of the M 92 globular star cluster by Michael Vlasov (Copyright © Michael Vlasov 2016) - presented with the author's permission

 

My Best Own Photos

eVscope

         

M 92 - May 16, 2020

 

M 92 -May 16, 2020, processed

 

M 92 - May 16, 2020, processed and sharpened

         

M 92 - Jun 11, 2020, Sky somewhat bright

 

M 92 - Jun 11, 2020, processed

 

M 92 - Jun 11, 2020, processed and sharpened

         

M 92 - Aug 25, 2020, manual exposure

 

M 92 - Aug 25, 2020, processed

 

M 92 - Aug 25, 2020, processed and sharpened

         

M 92 - Sep 15, 2020, manual exposure

 

M 92 - Sep 15, 2020, processed

 

M 92 - Sep 15, 2020, processed and sharpened

 

My Own Observations

Observations Summer to Autumn 2016

Observations May 2017

Observations October 2017

Observations September/October 2018

Observations August 2019

Observations September/October 2019

Observations April to September 2020

 

References

On this Site


Appendix: My Own Photos

eVscope

         

M 92 - Apr 15, 2020

 

M 92 - Apr 15, 2020, processed

 

M 56 - 92 15, 2020, processed and sharpened

         

M 92 - Apr 15, 2020

 

M 92 - Apr 15, 2020, processed

 

M 92 - Apr 15, 2020, processed and sharpened

         

M 92 - May 16, 2020

 

M 92 - May 16, 2020, processed

 

M 92 - May 16, 2020, processed and sharpened

         

M 92 - May 16, 2020

 

M 92 -May 16, 2020, processed

 

M 92 - May 16, 2020, processed and sharpened

         

M 92 - May 16, 2020

 

M 92 - May 16, 2020, processed

 

M 92 - May 16, 2020, processed and sharpened

         

M 92 - Jun 11, 2020, somewhat bright

 

M 92 - Jun 11, 2020, processed

 

M 92 - Jun 11, 2020, processed and sharpened

         

M 92 - Jul 3, 2020, sky too bright

 

M 92 - Jul 3, 2020, processed

 

M 92 - Jul 3, 2020, processed and sharpened

         

M 92 - Aug 19, 2020, manual exposure

 

M 92 - Aug 19, 2020, processed

 

M 92 - Aug 19, 2020, processed and sharpened

         

M 92 - Aug 19, 2020, manual exposure

 

M 92 - Aug 19, 2020, processed

 

M 92 - Aug 19, 2020, processed and sharpened

         

M 92 - Aug 25, 2020, manual exposure

 

M 92 - Aug 25, 2020, processed

 

M 92 - Aug 25, 2020, processed and sharpened

         

M 92 - Sep 15, 2020, manual exposure

 

M 92 - Sep 15, 2020, processed

 

M 92 - Sep 15, 2020, processed and sharpened

         

M 92 - Sep 15, 2020, manual exposure

 

M 92 - Sep 15, 2020, processed

 

M 92 - Sep 15, 2020, processed and sharpened

         

M 92 - Sep 15, 2020, manual exposure

 

M 92 - Sep 15, 2020, processed

 

M 92 - Sep 15, 2020, processed and sharpened

         

M 92 - Sep 28, 2020, disturbed by clouds

 

M 92 - Sep 28, 2020, processed

 

M 92 - Sep 28, 2020, processed and sharpened

         

M 92 - Sep 28, 2020, disturbed by clouds

 

M 92 - Sep 28, 2020, processed

 

M 92 - Sep 28, 2020, processed and sharpened