Messier 40
Optical double star in the constellation Ursa Major.
Also known as WNC 4 · M40
- Instance of
- double star
2
Sources- 1.“Messier 40”messier.seds.org/m/m040.htmlRetrieved 2017-09-25
- 2.Stated in SIMBAD
- double star
- Part of
Overview
All data
18 statements · 78% with external sources · numbers in brackets are citations
- Discovered
- October 24, 1764
1
Sources- 1.“Charles Messier's Catalog of Nebulae and Star Clusters”messier.seds.org/xtra/history/m-cat.htmlRetrieved 2017-09-25
- October 24, 1764
- Catalog code
- M 40 catalog: Messier object
1
- WDS J12222+5805AB catalog: Washington Double Star Catalog
1
- Winnecke 4 catalog: Winnecke Catalogue of Double Stars
1
- M 40 catalog: Messier object
- Distance from Earth
- 455 ly
1
- 455 ly
- Apparent magnitude
- 8.4 astronomical filter: V band
1
- 8.4 astronomical filter: V band
- Right ascension
- 185.5522 degree
- Declination
- 58.0829 degree
- Age estimated by a dating method
- 4.1 gigaannum
On other databases
2 identifiers linking Messier 40 across the web's reference databases