Gliese 880
| Observation data Epoch J2000 Equinox | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 22h 56m 34.805s[1] |
| Declination | 16° 33′ 12.36″[1] |
| Apparent magnitude (V) | 8.68[2] |
| Characteristics | |
| Evolutionary stage | Main-sequence star |
| Spectral type | M1.5V[3] |
| Apparent magnitude (B) | 10.187[2] |
| Apparent magnitude (R) | 7.80[2] |
| Apparent magnitude (I) | 7.100[2] |
| Apparent magnitude (J) | 5.360±0.020[2] |
| Apparent magnitude (H) | 4.800±0.036[2] |
| Apparent magnitude (K) | 4.523±0.016[2] |
| B−V color index | 1.507±0.015[2] |
| Astrometry | |
| Radial velocity (Rv) | −27.99±0.16[1] km/s |
| Proper motion (μ) | RA: −1034.733±0.026[1] mas/yr Dec.: −284.131±0.025[1] mas/yr |
| Parallax (π) | 145.6234 ± 0.0254[1] mas |
| Distance | 22.397 ± 0.004 ly (6.867 ± 0.001 pc) |
| Absolute magnitude (MV) | 9.50[2] |
| Details | |
| Mass | 0.5860±0.0586[4] M☉ |
| Radius | 0.689±0.044[4] R☉ |
| Surface gravity (log g) | 4.77[5] cgs |
| Temperature | 3,373±100[4] K |
| Metallicity [Fe/H] | +0.20±0.05[6] dex |
| Rotation | 37.5±0.1 d[7] |
| Rotational velocity (v sin i) | 2.07[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Gliese 880 is a small red dwarf star in the northern constellation of Pegasus that may host an exoplanetary companion. No stellar companions to Gliese 880 have been discovered as of 2020.[9]
Planetary system[]
In June 2019 a candidate planet was reported in orbit around Gliese 880.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| (unconfirmed) | 8.5+5.7 −4.7 M |