Eta Canis Majoris
Sign in to saveAlso known as Aludra, 31 Canis Majoris, HD 58350, eta CMa, 31 CMa, η CMa, η Canis Majoris, HR 2827
star in the constellation Canis Major
In the Vinony graph
Within Vinony's link graph, Eta Canis Majoris is referenced by 111 other articles, and connects out to stellar classification, year and Canis Major.
It sits within the topics Alpha Cygni variables, Bayer objects and Brightest stars.
Its subject is documented across 30 Wikipedia language editions.
Astronomical data · SIMBAD
- Object type
- s*b
- Spectral type
- B5Ia
- Distance
- 1,989 light-years
- Redshift
- z = 0.00013710424191293313
- Coordinates
- RA 111.0238° · Dec -29.3031°
via SIMBAD · CDS Strasbourg
Key facts
- Constellation
- Canis Major
- Right ascension
- 07 24 05.70228
- Declination
- −29 ° 18 ′ 11.1798 ″
- Apparent magnitude v
- 2.38 – 2.48
- Evolutionary stage
- Blue supergiant , likely a post- red supergiant
- Spectral type
- B5 Ia
- U b color index
- −0.708
- B v color index
- −0.087
- Variable type
- α Cyg
via Wikipedia infobox
Wikidata facts
- Instance of
- optical double
- Constellation
- Canis Major
- Radius
- 56.3
- Variable-star type
- Alpha Cygni variable
- Image
- Eta CMa.jpg
Show 15 more facts
- absolute magnitude
- -7.0
- spectral class
- B5p
- catalog code
- ALS 14888
- stellar rotational velocity
- 36
- right ascension component of proper motion
- -3.76
- apparent magnitude
- 2.450408
- right ascension
- 111.023759501
- declination
- -29.303105508
- effective temperature
- 12670
- radial velocity
- 39.0
- declination component of proper motion
- 4
- parallax
- 1.64
- epoch
- J2000.0
- age estimated by a dating method
- 8.3
- Commons category
- Eta Canis Majoris
Sources (3)
via Wikidata · CC0
~3 min read
Encyclopedic overview
Eta Canis Majoris is a blue supergiant star in the constellation of Canis Major. It has the proper name Aludra, pronounced /əˈluːdrə, əˈljuːdrə/; Eta Canis Majoris is its Bayer designation. This star has an apparent visual magnitude that varies between 2.38 and 2.48, which makes it the fifth-brightest in the constellation. Parallax measurements from the Hipparcos mission estimate a large distance of 2,000 light-years. It is drifting further away from the Sun with a line of sight velocity of 41 km/s.
Nomenclature
Excerpted from Wikipedia’s “Eta Canis Majoris” article, available under the CC BY-SA 4.0 licence.