Gliese 486
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 12h 47m 56.6249s[1] |
| Declination | +09° 45′ 05.0319″[1] |
| Apparent magnitude (V) | 11.395 |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | M3.5V[2] |
| Astrometry | |
| Radial velocity (Rv) | 19.106 km/s |
| Proper motion (μ) | RA: -1008.267[3] mas/yr Dec.: -460.034[3] mas/yr |
| Parallax (π) | 123.776 ± 0.0329[3] mas |
| Distance | 26.351 ± 0.007 ly (8.079 ± 0.002 pc) |
| Details[4] | |
| Mass | 0.323±0.015 M☉ |
| Radius | 0.328±0.011 R☉ |
| Luminosity | 0.01210±0.00023 L☉ |
| Temperature | 3340±54 K |
| Metallicity [Fe/H] | 0.07±0.16 dex |
| Rotation | 130.1+1.6 −1.2 d |
| Rotational velocity (v sin i) | <2[5] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Gliese 486, also known as Wolf 437, is a M-type main-sequence star in the constellation Virgo. Its surface temperature is 3340±54 K. Gliese 486 is similar to the Sun in its concentration of heavy elements, with a metallicity Fe/H index of 0.07±0.16. It was suspected to be a flare star,[6] although measurements available in 2019 did not reveal any flares.[7]
The star has an unremarkable magnetic field in the chromosphere of about 1.6 kilogauss.[5] It is rotating very slowly and is likely to be very old, belonging kinematically to the old thin disk of the Milky Way.[8]
Multiplicity surveys did not detect any stellar companions to Gliese 486 as at 2020.[9]
Planetary system[]
In 2021, one planet, named Gliese 486 b, was discovered on a tight, circular orbit.[4] It represents a rare class of rocky exoplanet suitable for spectroscopic characterization in the near future,[10] as soon as the James Webb Space Telescope is launched.[11]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 2.82+0.11 −0.12 M |