HD 102776
HD 102776, also known by its Bayer designation j Centauri (j Cen), is a star in the constellation Centaurus.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 11h 49m 41.06s[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 | |
| 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
- 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
- "NSV 5357". Variable Star Index. Retrieved 2020-02-19.
- 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.
- 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.
- 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.
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