Gamma1 Normae
  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Norma |
| Right ascension | 16h 17m 00.93411s[1] |
| Declination | −50° 04′ 05.2333″[1] |
| Apparent magnitude (V) | 4.98[2] |
| Characteristics | |
| Evolutionary stage | Supergiant |
| Spectral type | F9 Ia[3] |
| U−B color index | +0.49[2] |
| B−V color index | +0.80[2] |
| Astrometry | |
| Radial velocity (Rv) | −16.0±5.1[4] km/s |
| Proper motion (μ) | RA: −1.69[1] mas/yr Dec.: −3.39[1] mas/yr |
| Parallax (π) | 2.22±0.27 mas[1] |
| Distance | approx. 1,500 ly (approx. 450 pc) |
| Absolute magnitude (MV) | -3.62[3] |
| Details | |
| Mass | 5.37+0.61 −0.04[5] M☉ |
| Radius | 57±2[5] R☉ |
| Luminosity | 1,787+111 −109[5] L☉ |
| Surface gravity (log g) | 2.0[6] cgs |
| Temperature | 6,068[6] K |
| Metallicity [Fe/H] | −0.13[6] dex |
| Age | 53.4±7.4[7] Myr |
| Other designations | |
| γ Nor, CD−49°10474, HD 146143, HIP 79790, HR 6058, SAO 226619 | |
| Database references | |
| SIMBAD | data |
Gamma1 Normae, Latinized from γ1 Normae, is a single,[8] yellow-white hued star in the southern constellation of Norma. It is faintly visible to the naked eye with an apparent visual magnitude of 4.98.[2] The annual parallax shift is only 2.22±0.27 mas as measured from Earth,[1] which yields a rough distance estimate of 1,500 light years from the Sun. It is moving closer to the Sun with a radial velocity of around -16 km/s.[4]
This is an F-type supergiant star with a stellar classification of F9 Ia[3] It has 5.4 times the mass of the Sun and has expanded to about 57 times the Sun's radius. The star is radiating 1,787 times the Sun's luminosity from its enlarged photosphere[5] at an effective temperature of 6,068 K.[6] It is estimated to be around 53 million years old.[7]
γ2 Nor is a nearby star nearly a magnitude brighter.
References
[edit]- ^ a b c d e f 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. S2CID 18759600.
- ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
- ^ a b c Kovtyukh, V. V.; Chekhonadskikh, F. A.; Luck, R. E.; Soubiran, C.; Yasinskaya, M. P.; Belik, S. I. (2010). "Accurate luminosities for F-G supergiants from FeII/FeI line depth ratios". Monthly Notices of the Royal Astronomical Society. 408 (3): 1568. Bibcode:2010MNRAS.408.1568K. doi:10.1111/j.1365-2966.2010.17217.x.
- ^ a b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d Kovtyukh, V. V.; Gorlova, N. I.; Belik, S. I. (2012). "Accurate luminosities from the oxygen λ7771-4 Å triplet and the fundamental parameters of F-G supergiants". Monthly Notices of the Royal Astronomical Society. 423 (4): 3268–73. arXiv:1204.4115. Bibcode:2012MNRAS.423.3268K. doi:10.1111/j.1365-2966.2012.21117.x. S2CID 118683158.
- ^ a b Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1): 190–200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. S2CID 118629873.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
