HD 102776

HD 102776, also known by its Bayer designation j Centauri (j Cen), is a star in the constellation Centaurus.

This article is about j centauri. It is not to be confused with J Centauri, i Centauri, l Centauri, or ι Centauri.

j Centauri

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Centaurus
Right ascension	11^h 49^m 41.06^s[1]
Declination	−63° 47′ 18.5″[1]
Apparent magnitude (V)	+4.30 - 4.39[2]
Characteristics
Spectral type	B3Vne
U−B color index	−0.59
B−V color index	−0.15
Variable type	γ Cas[2]
Astrometry
Radial velocity (Rv)	+29 km/s
Proper motion (μ)	RA: -20.76 ± 0.56[1] mas/yr Dec.: 4.30 ± 0.48[1] mas/yr
Parallax (π)	5.48 ± 0.59[1] mas
Distance	approx. 600 ly (approx. 180 pc)
Absolute magnitude (MV)	−1.98[3]
Details
Mass	5.955[4] M☉
Radius	5.00±0.10[5] R☉
Luminosity	1,342[3] L☉
Surface gravity (log g)	3.20±0.03[5] cgs
Temperature	20,000±200[5] K
Rotational velocity (v sin i)	200±4[5] km/s
Other designations
HR 4537, HD 102776, CP−63°1988, FK5 2944, HIP 57669, SAO 251602, GC 16201, NSV 5357
Database references
SIMBAD	data

j Centauri is a blue-white B-type main sequence dwarf. It is approximately 600 light years from Earth. It is classified as a suspected Gamma Cassiopeiae type variable star and with a visual magnitude varying from magnitude +4.30 to +4.39.[2]

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
2. "NSV 5357". Variable Star Index. Retrieved 2020-02-19.
3. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.
4. Kervella, Pierre; Arenou, Frédéric; Mignard, François; Thévenin, Frédéric (2019). "Stellar and substellar companions of nearby stars from Gaia DR2. Binarity from proper motion anomaly". Astronomy and Astrophysics. 623: A72. arXiv:1811.08902. Bibcode:2019A&A...623A..72K. doi:10.1051/0004-6361/201834371.
5. Arcos, C.; et al. (March 2018). "Stellar parameters and H α line profile variability of Be stars in the BeSOS survey". Monthly Notices of the Royal Astronomical Society. 474 (4): 5287–5299. arXiv:1711.08675. Bibcode:2018MNRAS.474.5287A. doi:10.1093/mnras/stx3075.