HD 63433
A light curve for V377 Geminorum, plotted from TESS data, with the 6.46 day rotation period shown in red, | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Gemini |
| Right ascension | 07h 49m 55.061s |
| Declination | +27° 21′ 47.46″ |
| 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: −10.220 mas/yr Dec.: −11.235 mas/yr |
| Parallax (π) | 44.6848±0.0228 mas |
| Distance | 72.99 ± 0.04 ly (22.38 ± 0.01 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 | 5,640±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 | |
| V377 Gem, BD+27°1490, HD 63433, HIP 38228, SAO 79729, PPM 98012, TOI-1726, TYC 1933-747-1, GSC 01933-00747, 2MASS J07495506+2721473 | |
| Database references | |
| SIMBAD | data |
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. With an apparent magnitude of 6.9, it is not visible to the naked eye, but can be seen with a small telescope or binoculars. It is part of the Ursa Major Moving Group.
HD 63433 has nearly the same radius and mass as the Sun, hence is classified as a Sun-like star. However, it is much younger than the Sun, less than one tenth as old at about 400 million years. There are three exoplanets orbiting it: one is classified as an Earth-sized planet, while the other two are mini-Neptunes.