GJ 3379
GJ 3379 (Giclas 99-49) is the nearest star in the Orion constellation, located at a distance of 17 light years from the Sun based on parallax. It is a single star with an apparent visual magnitude of +11.31 and an absolute magnitude of +12.71, therefore, the star is not visible with the naked eye. It is positioned in the upper left part of the Orion constellation, to the SSE of Betelgeuse. This star is drifting further away with a radial velocity of +30.0 kilometers per second. In the past, this star had a relatively close encounter with the Solar System. Some 161,000±6,000 years ago, it achieved a minimum distance of 4.08 ± 0.20 ly (1.25 ± 0.06 pc).
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Orion |
| Right ascension | 06h 00m 03.50386s |
| Declination | +02° 42′ 23.5968″ |
| Apparent magnitude (V) | +11.307 |
| Characteristics | |
| Spectral type | M3.5Ve or dM4.0 |
| B−V color index | 1.667 |
| Astrometry | |
| Radial velocity (Rv) | +30.228±0.0038 km/s |
| Proper motion (μ) | RA: +309.487 mas/yr Dec.: −40.640 mas/yr |
| Parallax (π) | 192.0135 ± 0.0310 mas |
| Distance | 16.986 ± 0.003 ly (5.2080 ± 0.0008 pc) |
| Absolute magnitude (MV) | +12.71 |
| Details | |
| Mass | 0.2312±0.0058 M☉ |
| Radius | 0.2457±0.0078 R☉ |
| Luminosity | 0.006329±0.000088 L☉ |
| Luminosity (bolometric) | 0.0086 L☉ |
| Surface gravity (log g) | 5.10±0.07 cgs |
| Temperature | 3,284±51 K |
| Metallicity [Fe/H] | −0.12±0.16 dex |
| Rotation | 1.809 d |
| Rotational velocity (v sin i) | 5.8±0.3 km/s km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
GJ 3379 Location of GJ 3379 in the constellation Orion | |
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