HD 43691
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 19m 34.676s |
| Declination | +41° 05′ 32.30″ |
| Apparent magnitude (V) | 8.03 |
| Characteristics | |
| Evolutionary stage | subgiant |
| Spectral type | G0 IV |
| B−V color index | 0.596±0.015 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | −28.97±0.02 km/s |
| Proper motion (μ) | RA: 22.684 mas/yr Dec.: −53.140 mas/yr |
| Parallax (π) | 11.6726±0.0346 mas |
| Distance | 279.4 ± 0.8 ly (85.7 ± 0.3 pc) |
| Absolute magnitude (MV) | 3.52 |
| Details | |
| Mass | 1.32±0.09 M☉ |
| Radius | 1.704±0.023 R☉ |
| Luminosity | 2.24±0.02 L☉ |
| Surface gravity (log g) | 4.19±0.02 cgs |
| Temperature | 5,920±34 K |
| Metallicity [Fe/H] | 0.32±0.03 dex |
| Rotational velocity (v sin i) | 4.7 km/s |
| Age | 3.1±2.5 Gyr |
| Other designations | |
| BD+41°1415, HD 43691, HIP 30057, SAO 41025, PPM 48960, TYC 2930-2105-1, GSC 02930-02105, 2MASS J06193467+4105321 | |
| Database references | |
| SIMBAD | data |
HD 43691 is a star with an orbiting exoplanet in the constellation Auriga. With an apparent visual magnitude of 8.03, it is too faint to be visible to the naked eye. This system is located at a distance of 279 light years based on parallax measurements, but is drifting closer with a heliocentric radial velocity of −29 km/s.
This is a slightly evolved G-type subgiant star with a stellar classification of G0 IV. It is ceasing thermonuclear fusion of hydrogen in its core and will expand to become a red giant. The star has 32% greater mass than the Sun and has a 70% larger girth. It is radiating 2.2 times the luminosity of the Sun from its photosphere at an effective temperature of 5,920 K. The level of chromospheric activity is minimal, allowing for accurate measurement of radial velocity variation.