HD 108874
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Coma Berenices |
| Right ascension | 12h 30m 26.882s |
| Declination | +22° 52′ 47.38″ |
| Apparent magnitude (V) | 8.76 |
| Characteristics | |
| Spectral type | G5 V or G9 V |
| B−V color index | 0.738±0.018 |
| Astrometry | |
| Radial velocity (Rv) | −30.052±0.0028 km/s |
| Proper motion (μ) | RA: 127.469 mas/yr Dec.: −89.912 mas/yr |
| Parallax (π) | 16.7730±0.0443 mas |
| Distance | 194.5 ± 0.5 ly (59.6 ± 0.2 pc) |
| Absolute magnitude (MV) | 4.79 |
| Details | |
| Mass | 0.996±0.032 M☉ |
| Radius | 1.062±0.070 R☉ |
| Luminosity | 1.19 L☉ |
| Surface gravity (log g) | 4.39± cgs |
| Temperature | 5,585±20 K |
| Metallicity [Fe/H] | 0.18 dex |
| Rotation | 40.20±0.15 days |
| Rotational velocity (v sin i) | 1.36±0.26 km/s |
| Age | 6.48±3.47 Gyr |
| Other designations | |
| BD+23°2466, HD 108874, HIP 61028, SAO 82344, PPM 101950 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 108874 is a star with a pair of orbiting exoplanets in the northern constellation of Coma Berenices. It is located 194.5 light years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −30 km/s. The absolute magnitude of this star is 4.79, but at that distance the star has an apparent visual magnitude of 8.76, making it too faint to be visible to the naked eye. HD 108874 has a relatively large proper motion, traversing the celestial sphere at an angular rate of 0.157″ yr−1.
The spectrum of HD 108874 presents as a G-type main-sequence star with a stellar classification of G5 V. (An alternate source gives a class of G9 V.) It is probably billions of years older than the Sun although the age is not well constrained. The level of magnetic activity in the chromosphere is lower than in the Sun and it is spinning with a low rotation period of 40 days. The star has about the same mass as the Sun, but the radius is 6% larger. The abundance of iron, an indicator of the star's metallicity, is 1.18 times that of the Sun. The star is radiating 1.19 times the luminosity of the Sun from its photosphere at an effective temperature of about 5600 K.