Eta Normae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Norma |
| Right ascension | 16h 03m 12.89783s [1] |
| Declination | −49° 13′ 46.9151″[1] |
| Apparent magnitude (V) | 4.02[1] |
| Characteristics | |
| Spectral type | G8III[1] |
| Astrometry | |
| Radial velocity (Rv) | 0.3 ± 2[1] km/s |
| Proper motion (μ) | RA: 42.05 [1] mas/yr Dec.: 9.14[1] mas/yr |
| Parallax (π) | 14.86 ± 0.25[2] mas |
| Distance | 219 ± 4 ly (67 ± 1 pc) |
| Absolute magnitude (MV) | 0.524[3] |
| Details | |
| Mass | 2.78[3] M☉ |
| Luminosity | 67[4] L☉ |
| Surface gravity (log g) | 2.84[3] cgs |
| Temperature | 4,977[3] K |
| Metallicity [Fe/H] | −0.05[3] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
Eta Normae (η Nor) is a star in the constellation Norma. Its apparent magnitude is 4.65. Located between 215 and 223 light-years distant, it is a yellow giant of spectral type G8III that has swollen and cooled off the main sequence.[1] It shines with a luminosity approximately 67[4] times that of the Sun and has a surface temperature of 4,977 K.[3]
References
- 1 2 3 4 5 6 7 8 9 SIMBAD, Eta Normae (accessed 22 December 2012)
- ↑ 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 6 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.
- 1 2 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. Bibcode:2012MNRAS.427..343M. arXiv:1208.2037 . doi:10.1111/j.1365-2966.2012.21873.x.
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