2 Centauri

2 Centauri

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Centaurus
Right ascension	13^h 49^m 26.72^s[1]
Declination	−34° 27′ 02.8″[1]
Apparent magnitude (V)	+4.19
Characteristics
Spectral type	M4.5III
U−B color index	+1.45
B−V color index	+1.50
Variable type	semiregular
Astrometry
Radial velocity (Rv)	+41 km/s
Proper motion (μ)	RA: -41.68 ± 0.23[1] mas/yr Dec.: -59.77 ± 0.18[1] mas/yr
Parallax (π)	17.82 ± 0.21[1] mas
Distance	183 ± 2 ly (56.1 ± 0.7 pc)
Absolute magnitude (MV)	+0.51
Other designations
g Centauri, V806 Centauri, HR 5192, HD 120323, CD−33°9358, HIP 67457, SAO 204875, GC 18666
Database references
SIMBAD	data

2 Centauri is a star in the constellation Centaurus.

2 Centauri is a M-type red giant with a mean apparent magnitude of +4.19. It is approximately 183 light years from Earth. It is classified as a semiregular variable star and its brightness varies from magnitude +4.16 to +4.26 with a period of 12. days.

References

1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry