Messier 9 (M 9)

Introduction | Map | Find/Identify | 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 9 (NGC 6333) in the constellation Ophiuchus.

Introduction

The globular star cluster M 9 is located in the constellation Ophiuchus/Serpent Bearer. According to Stoyan, it resembles many other globular clusters in this constellation. M 9 is quite small, bright, and concentrated towards the center.

Size: 3' (Stoyan)
Distance: 22,000 light years (Stoyan)
Rating: ** (Stoyan)

Map

M 9 in constellation Ophiuchus/Serpent Bearer is located to the left and below of the star Sabik and fairly in the south. (Image Courtesy of SkySafari Astronomy, www.simulationcurriculum.com)

Find/Identify

Find: M 9 is located to the left and below of the star Sabik at the lower left corner of constellation Ophiuchus and fairly in the south (see map above).

Identify: If you found the star Sabik (at the bottom left of constellation Ophiuchus), you will also be able to identify M 9.

My Best Own Photos

eVscope

M 9 - Aug 23, 2020		M 9 - Aug 23, 2020, processed		M 9 - Aug 23, 2020, processed and sharpened
M 9 - Aug 23, 2020		M 9 - Aug 23, 2020, processed		M 9 - Aug 23, 2020, processed and sharpened

My Own Observations

Observations September/October 2019

• Sep 28, 2019 (Sumène, France: StarTravel 120/600 on AZ Pronto Mount): M 9 (24, 10, 7, 4 mm) small, bright core, appeared as somewhat irregular; not resolved.

Observations May to July 2020

• May 29, 2020 (Erkerode: eVscope): M 9 photographed in the new rectangular format without overlay, sky too bright
• June 1, 2020 (Erkerode: eVscope): M 9 photographed (o.O., r.F.)
• June 11, 2020 (Mühlhausen/Kraichgau: eVscope): M 9 photographed (o.O., r.F.)
• Jul 23, 2020 (Erkerode: Skymax-127 on AZ Pronto Mount): M 9 observed, faint
• August 23, 2020 (Mühlhausen/Kraichgau: eVscope): M 9 photographed (o.O., r.F.)

Observations July 2021

• July 17, 2021 (Mühlhausen/Kraichgau: eVscope): M 9photographed (n.o., r.f.), new image size and processing, poor collimation

References

• Messier Catalogue - Messier 9: messier.seds.org/m/m009.html
• Messier 9 (Wikipedia): en.wikipedia.org/wiki/Messier_9

On this Site

• Sky-Watcher StarTravel 120/600 OTA Information (4.7" Refractor, Borrowed)
• Sky-Watcher Skymax-127 OTA Information (5" Maksutov-Cassegrain)
• Unistellar eVscope Information
• Sky-Watcher AZ Pronto Mount Information

Appendix: My Own Photos

eVscope

M 9 - May 29, 2020, too bright		M 9 - May 29, 2020, processed		M 9 - May 29, 2020, processed and sharpened
M 9 - Jun 1, 2020		M 9 - Jun 1, 2020, processed		M 9 - Jun 1, 2020, processed and sharpened
M 9 - Jun 11, 2020		M 9 - Jun 11, 2020, processed		M 9 - Jun 11, 2020, processed and sharpened
M 9 - Aug 23, 2020		M 9 - Aug 23, 2020, processed		M 9 - Aug 23, 2020, processed and sharpened
M 9 - Aug 23, 2020		M 9 - Aug 23, 2020, processed		M 9 - Aug 23, 2020, processed and sharpened
M 9 - Jul 17, 2021		M 9 - Jul 17, 2021, processed		M 9 - Jul 17, 2021, processed and sharpened