HD 63433
HD 63433 (TOI-1726, V377 Geminorum) is a G-type main sequence star located 73 light-years from Earth in the zodiacal constellation Gemini, visually close to the star Pollux. It is classified as a Sun-like star, having a mass 99% similar and a size 91% similar to that of the Sun. However, it is a much younger star, less than one tenth as old with an age of about 400 million years. With an apparent magnitude of 6.9, it is not visible to the naked eye, but can be seen with a small telescope. Based on its kinematic, rotational and lithium abundance properties, it is part of the Ursa Major Moving Group. There are three exoplanets orbiting it, one is classified as an Earth-sized planet, while the two others are mini-Neptunes.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Gemini |
| Right ascension | 07h 49m 55.05s |
| Declination | 27° 21′ 47.45″ |
| Apparent magnitude (V) | 6.92 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | G5V |
| Variable type | BY Draconis |
| Astrometry | |
| Radial velocity (Rv) | −16.07±0.13 km/s |
| Proper motion (μ) | RA: −10.0268±0.0846 mas/yr Dec.: −11.3143±0.0487 mas/yr |
| Parallax (π) | 44.6848 mas |
| Distance | 73.035±0.073 ly (22.4035±0.0225 pc) |
| Absolute magnitude (MV) | 5.19 |
| Details | |
| Mass | 0.99±0.03 M☉ |
| Radius | 0.912±0.034 R☉ |
| Luminosity | 0.753±0.026 L☉ |
| Surface gravity (log g) | 4.52±0.05 cgs |
| Temperature | 5640±74 K |
| Metallicity [Fe/H] | 0.03±0.05 dex |
| Rotation | 6.45±0.05 d |
| Rotational velocity (v sin i) | 7.3±0.3 km/s |
| Age | 414±23 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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