GJ 1151
GJ 1151 is a star located in the northern circumpolar constellation of Ursa Major at a distance of 26.2 light-years (8.0 parsecs) from the Sun. It has a reddish hue and is too faint to be visible to the naked eye with an apparent visual magnitude of 14.0 The star is moving closer with a radial velocity of −36 km/s, and has a relatively large proper motion, traversing the celestial sphere at a rate of 1.815″·yr−1.
Artist's impression of GJ 1151 and an orbiting planet | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ursa Major |
| Right ascension | 11h 50m 57.72053s |
| Declination | +48° 22′ 38.5612″ |
| Apparent magnitude (V) | 14.008 |
| Characteristics | |
| Spectral type | dM4.5 |
| B−V color index | 1.787 |
| Astrometry | |
| Radial velocity (Rv) | −36.13±0.26 km/s |
| Proper motion (μ) | RA: -1545.069 mas/yr Dec.: -962.724 mas/yr |
| Parallax (π) | 124.3378 ± 0.0549 mas |
| Distance | 26.23 ± 0.01 ly (8.043 ± 0.004 pc) |
| Absolute magnitude (MV) | 14.482±0.022 |
| Details | |
| Mass | 0.1639±0.0093 M☉ |
| Radius | 0.1781±0.0042 R☉ |
| Luminosity (bolometric) | 0.003315±0.000018 L☉ |
| Surface gravity (log g) | 5.09±0.09 cgs |
| Temperature | 3,143±26 K |
| Metallicity [Fe/H] | −0.12±0.10 dex |
| Rotation | 140±10 d |
| Rotational velocity (v sin i) | 2.0 km/s |
| Age | 2.5 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is a small red dwarf star of spectral type dM4.5. It is 2.5 billion years old and is spinning with a projected rotational velocity of 2.0 km/s. The star has 15.4% of the mass of the Sun and 19.0% of the Sun's radius, with an effective temperature of 3,143 K.
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