Gamma1 Normae
Star in the constellation Norma
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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]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 |
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.