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 | 6.6±0.4[5] M☉ |
Radius | 160[6] R☉ |
Luminosity | 2039.91[7] L☉ |
Surface gravity (log g) | 2.0[8] cgs |
Temperature | 6,068[8] K |
Metallicity [Fe/H] | −0.13[8] dex |
Age | 53.4±7.4[5] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Gamma1 Normae, Latinized from γ1 Normae, is a single,[9] 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 6.6[5] times the mass of the Sun and has expanded to about 160[6] times the Sun's radius. The star is radiating 2,040[7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 6,068 K.[8] It is estimated to be around 53 million years old.[5]
γ2 Nor is a nearby star nearly a magnitude brighter.