Messier 28 (M 28)

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

On this page I collect my observations of the globular star cluster M 28 (NGC 6626) in the constellation Sagittarius.

Introduction

The globular star cluster M 28 is located in the constellation Sagittarius, and Stoyan writes that it is well worth seeing. To my eyes, it appeared definitely smaller than the nearby M 22.

M 28 (NGC 6626)
Size: 5' (Stoyan)
Distance: 20,000 light years (Stoyan)
Rating: ** (Stoyan)

Map

M 28 in the constellation Sagittarius and in the context of other nearby DSO; M 22, a large globular star cluster, is nearby and to the left of it. (Image Courtesy of SkySafari Astronomy, www.simulationcurriculum.com)

My Own Photos

M 28 - May 29, 2020		M 28 - May 29, 2020, photo left processed		M 28 - May 29, 2020, processed and sharpened
M 28 - Jun 1, 2020		M 28 - Jun 1, 2020, photo left processed		M 28 - Jun 1, 2020, processed and sharpened
M 28 - Aug 9, 2020, many hot pixels		M 28 - Aug 9, 2020, photo left processed		M 28 - Aug 9, 2020, processed and sharpened
M 28 - Jul 18, 2021		M 28 - Jul 18, 2021, photo left processed		M 28 - Jul 18, 2021, processed and sharpened

My Own Observations

Observations September/October 2019

• Sep 19, 2019 (Sumène, France: PS 72/432 on AZ Pronto Mount): M 28 (24, 7, 4 mm) close to M 22, much smaller
• Sep 20, 2019 (Sumène, France: StarTravel 120/600 on AZ Pronto Mount): M 28 (24, 7, 4 mm): close to M 22, much smaller
• Sep 28, 2019 (Sumène, France: StarTravel 120/600 on AZ Pronto Mount): M 28 (24, 10, 7, 4 mm) resolved into fine stars with 4 mm, smaller than M 22.
• Sep 30, 2019 (Sumène, France: StarTravel 120/600 on AZ Pronto Mount): M 28 (24, 10, 7, 4 mm) smaller than M 22.

Observations May to August 2020

• May 29, 2020 (Erkerode: eVscope): M 28 photographed (new rectangular format without overlay)
• Jun 1, 2020 (Erkerode: eVscope): M 28 photographed, photo disturbed by trees (n.o., r.f.)
• August 9, 2020 (Mühlhausen/Kraichgau: eVscope): M 28 photographed (n.o., r.f.)

Observations July 2021

• July 18, 2021 (Mühlhausen/Kraichgau: eVscope): M 28 photographed (n.o., r.f.), new image size and processing, poor collimation despite new collimation

References

• Messier Catalogue - Messier 28: messier.seds.org/m/m028.html
• Messier 28 (Wikipedia): en.wikipedia.org/wiki/Messier_28

On this Site

• Omegon Photography Scope 72/432 ED OTA Information (2.8" Refractor)
• Sky-Watcher StarTravel 120/600 OTA Information (4.7" Refractor, Borrowed)
• Unistellar eVscope Information
• Sky-Watcher AZ Pronto Mount Information