Gamma2 Normae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Norma |
| Right ascension | 16h 19m 50.42227s [1] |
| Declination | −50° 09′ 19.8223″ [1] |
| Apparent magnitude (V) | 4.02[1] |
| Characteristics | |
| Spectral type | G8III[1] |
| U−B color index | +1.07[2] |
| B−V color index | +1.08[2] |
| Astrometry | |
| Radial velocity (Rv) | −28.90 ± 0.7[1] km/s |
| Proper motion (μ) | RA: -159.71 [1] mas/yr Dec.: -52.25[1] mas/yr |
| Parallax (π) | 25.33 ± 0.20[3] mas |
| Distance | 129 ± 1 ly (39.5 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.057[4] |
| Details | |
| Mass | 2.16[4] M☉ |
| Surface gravity (log g) | 2.80[4] cgs |
| Temperature | 4,699[4] K |
| Metallicity [Fe/H] | 0.23[4] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Gamma2 Normae (γ2 Nor) is the brightest star in the constellation Norma. Its apparent magnitude is 4.02. Located 129 ± 1 light-years away from Earth,[3] it is a yellow giant of spectral type G8III around 2 to 2.5 times as massive as the Sun that has swollen to a diameter 10 times that of the Sun. It is itself a close optical double, with a magnitude 10 companion star related by line of sight only.[5]
γ1 Nor is a nearby star nearly a magnitude fainter.
References
- 1 2 3 4 5 6 7 8 SIMBAD, HR 6072 (accessed 22 December 2012)
- 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M.
- 1 2 van Leeuwen, F. (2007). "Validation of the New Hipparcos Reduction". Astronomy and Astrophysics. 474 (2): 653–64. Bibcode:2007A&A...474..653V. arXiv:0708.1752
. doi:10.1051/0004-6361:20078357. - 1 2 3 4 5 Liu, Y. J.; et al. (2007), "The abundances of nearby red clump giants", Monthly Notices of the Royal Astronomical Society, 382 (2): 553–66, Bibcode:2007MNRAS.382..553L, doi:10.1111/j.1365-2966.2007.11852.x.
- ↑ Kaler, James B. "Gamma-2 Normae". Stars. University of Illinois. Retrieved 23 March 2015.
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