The Full Wiki

More info on Gamma Centauri

Gamma Centauri: Wikis

Advertisements

Note: Many of our articles have direct quotes from sources you can cite, within the Wikipedia article! This article doesn't yet, but we're working on it! See more info or our list of citable articles.

Encyclopedia

From Wikipedia, the free encyclopedia

Gamma Centauri A/B
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 12h 41m 31.0s
Declination −48° 57′ 35″
Apparent magnitude (V) +2.2 (+2.9/+2.9)
Characteristics
Spectral type A0III/A0III
U-B color index −0.01
B-V color index −0.01
Variable type none
Astrometry
Radial velocity (Rv) −6 km/s
Proper motion (μ) RA: −187.28 mas/yr
Dec.: −1.20 mas/yr
Parallax (π) 25.01 ± 1.01 mas
Distance 130.4 ly
(40.0 pc)
Absolute magnitude (MV) −0.8 (−0.1/−0.1)
Details
Mass 2.8 M
Radius 36.5 R
Luminosity 90/star L
Temperature 9,300 K
Metallicity ?
Rotation ~81 km/s.
Age ? years
Orbit
Companion γ Centauri B
Period (P) 84.5 yr
Semimajor axis (a) 34AU=0.86"
Eccentricity (e) 0.79
Inclination (i) 114°
Longitude of the node (Ω)
Periastron epoch (T) 1931.2
Other designations
Muhlifain, HR 4819, HD 110304, CD−48°7597, SAO 223603, WDS 12415-4858, HIP 61932, GC 17262, CCDM J12415-4858
Database references
SIMBAD data

Gamma Centauri (γ Cen / γ Centauri) is a star in the constellation Centaurus. It has the proper name Muhlifain,[1] not to be confused with Muliphein, which is γ Canis Majoris; both names derive from the same Arabic root.

Gamma Centauri is a double star approximately 130 light years from Earth, which consists of two spectral type A0 stars each of apparent magnitude +2.9. For the resolution of the double star system a telescope of at least 15 centimeters in aperture is necessary. They have an orbital period of 83 years.

Year Angular separation Position angle
1990 1.4″ 353°
2000 1.0″ 347°
2005 0.7″ 341°
2010 0.4″ 324°

References

  1. ^ Kunitzsch, P., Arabische Sternnamen in Europa, Otto Harrassowitz, Wiesbaden, p.188.
Advertisements

Advertisements






Got something to say? Make a comment.
Your name
Your email address
Message