Global InformationEta1 Pictoris information
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Pictor |
| Right ascension | 05h 02m 48.68641s[1] |
| Declination | −49° 09′ 05.0644″[1] |
| Apparent magnitude (V) | +5.37[2] |
| Characteristics | |
| Spectral type | F5 V[3] |
| U−B color index | −0.01[2] |
| B−V color index | +0.43[2] |
| Astrometry | |
| Radial velocity (Rv) | 21.4±2.8[4] km/s |
| Proper motion (μ) | RA: −43.67[1] mas/yr Dec.: +27.37[1] mas/yr |
| Parallax (π) | 38.35 ± 0.18 mas[1] |
| Distance | 85.0 ± 0.4 ly (26.1 ± 0.1 pc) |
| Absolute magnitude (MV) | 3.28[5] |
| Details | |
| Mass | 1.37[6] M☉ |
| Radius | 1.1[7] R☉ |
| Luminosity | 3.69[8] L☉ |
| Surface gravity (log g) | 4.17[6] cgs |
| Temperature | 6,631±225[6] K |
| Metallicity [Fe/H] | −0.05[3] dex |
| Rotational velocity (v sin i) | 22.7±1.1[5] km/s |
| Age | 2.15[6] Gyr |
| Other designations | |
η1 Pic, CD−49° 1541, GJ 187, HD 32743, HIP 23482, HR 1649, SAO 217140[9] | |
| Database references | |
| SIMBAD | data |
η1 Pictoris, Latinised as Eta1 Pictoris, is a solitary[10] star in the southern constellation of Pictor. It is faintly visible to the naked eye with an apparent visual magnitude of +5.37.[2] Based upon an annual parallax shift of 38.35 mas as seen from the Earth,[1] the system is located 85 light years from the Sun. The star made its closest approach to the Sun about 1.1 million years ago with a perihelion passage of about 24 ly (7.5 pc).[11]
This is an F-type main sequence star with a stellar classification of F5 V[3] and it is chromospherically active.[3] It is an estimated 2.15[6] billion years old and is spinning with a projected rotational velocity of 22.7 km/s.[5] The star has 1.4[6] times the mass of the Sun and about 1.1[7] times the Sun's radius. It is radiating 3.7[8] times the Sun's luminosity from its photosphere at an effective temperature of roughly 6,631 K.[6]
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