File:M28_-_HST-U-V-IR.jpg · Wikimedia Commons · See Wikimedia Commons
Messier 28 is a dense, spherical collection of hundreds of thousands of stars held together by gravity, located about 18,000 light-years away in the constellation Sagittarius. Astronomers study globular clusters like this one to better understand the early history of our galaxy and the properties of old stars.
AI-generated from the Wikipedia summary — may contain errors.
In the Vinony graph
Within Vinony's link graph, Messier 28 is referenced by 605 other articles, and connects out to New General Catalogue, Messier object and Lagoon Nebula.
It is catalogued under topics including Astronomical objects discovered in 1764, Discoveries by Charles Messier and Globular clusters.
Its subject is documented across 52 Wikipedia language editions.
Key facts
- Class
- IV
- Constellation
- Sagittarius
- Right ascension
- 18 24 32.89
- Declination
- –24 ° 52 ′ 11.4 ″
- Distance
- 18.26 ± 0.98 kly (5.6 ± 0.3 kpc )
- Apparent dimensions v
- 11′.2
- Mass
- 5.51 × 10 M ☉
- Radius
- 30 ly
- V hb
- 15.55 ± 0.10
- Metallicity
- [ Fe/H ] = –1.32 dex
- Estimated age
- 12.0 Gyr
- Notable features
- Contains first pulsar discovered in a globular
- Other designations
- GCl 94, M 28, NGC 6626
via Wikipedia infobox
Wikidata facts
- Instance of
- globular cluster
- Part of
- Milky Way
- Constellation
- Sagittarius
- Distance from Earth
- 17900
- Radius
- 30
- Image
- Messier 28 HST11615 02R814GB390asinh.png
Show 15 more facts
- Commons category
- Messier 28
- catalog code
- [KPS2012] MWSC 2908
- discoverer or inventor
- Charles Messier
- metallicity
- -1.21
- time of discovery or invention
- 1764-07-27
- Commons gallery
- Messier 28
- radial velocity
- 1.0
- apparent magnitude
- 5.424
- absolute magnitude
- -8.16
- spectral class
- IV
- right ascension
- 276.137042
- declination
- -24.869833
- epoch
- J2000.0
- right ascension component of proper motion
- 0.630
- declination component of proper motion
- -8.460
Sources (2)
via Wikidata · CC0
~2 min read
Encyclopedic overview
Messier 28 or M28, also known as NGC 6626, is a globular cluster of stars in the center-west of Sagittarius. It was discovered by French astronomer Charles Messier in 1764. He briefly described it as a "nebula containing no star... round, seen with difficulty in 3 1⁄2-foot telescope; Diam 2′."
Location
Excerpted from Wikipedia’s “Messier 28” article, available under the CC BY-SA 4.0 licence.