Pi3 Orionis
Pi3 Orionis (π3 Orionis, abbreviated Pi3 Ori, π3 Ori), also named Tabit /ˈteɪbɪt/, is a star in the equatorial constellation of Orion. At an apparent visual magnitude of 3.16, it is readily visible to the naked eye and is the brightest star in the lion's hide (or shield) that Orion is holding. As measured using the parallax technique, it is 26.32 light-years (8.07 parsecs) distant from the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Orion |
| Right ascension | 04h 49m 50.41091s |
| Declination | +06° 57′ 40.5883″ |
| Apparent magnitude (V) | 3.16 |
| Characteristics | |
| Spectral type | F6 V |
| U−B color index | +0.00 |
| B−V color index | +0.46 |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | 24.1 km/s |
| Proper motion (μ) | RA: 464.06 mas/yr Dec.: 11.21 mas/yr |
| Parallax (π) | 123.94 ± 0.17 mas |
| Distance | 26.32 ± 0.04 ly (8.07 ± 0.01 pc) |
| Absolute magnitude (MV) | 3.65 |
| Details | |
| Mass | 1.236 M☉ |
| Radius | 1.323 ± 0.004 R☉ |
| Luminosity | 2.822 ± 0.030 L☉ |
| Surface gravity (log g) | 4.4 cgs |
| Temperature | 6,516 ± 19 K |
| Metallicity [Fe/H] | 0.02 dex |
| Rotational velocity (v sin i) | 17 km/s |
| Age | 1.4 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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