HD 138573
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 32m 43.653s[1] |
| Declination | +10° 58′ 05.88″[1] |
| Apparent magnitude (V) | 7.22[2] |
| Characteristics | |
| Evolutionary stage | Main sequence[1] |
| Spectral type | G5 IV-V[3] |
| B−V color index | 0.656[4] |
| Astrometry | |
| Radial velocity (Rv) | −35.67±0.12[1] km/s |
| Proper motion (μ) | RA: −5.880 mas/yr[1] Dec.: 158.609 mas/yr[1] |
| Parallax (π) | 33.1373±0.0240 mas[1] |
| Distance | 98.43 ± 0.07 ly (30.18 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.82[4] |
| Details | |
| Mass | 0.98±0.01[5] M☉ |
| Radius | 1.038±0.021[1] R☉ |
| Luminosity | 0.994±0.005[1] L☉ |
| Surface gravity (log g) | 4.41±0.01[5] cgs |
| Temperature | 5,740±3[5] K |
| Metallicity [Fe/H] | −0.024±0.003[5] dex |
| Rotational velocity (v sin i) | 1.30[6] km/s |
| Age | 6.50+0.29 −0.42[5] Gyr |
| Other designations | |
| BD+11 2816, HD 138573, HIP 76114, SAO 101603[7] | |
| Database references | |
| SIMBAD | data |
HD 138573 is a G-type main-sequence star in the constellation Serpens, class G5IV-V, roughly 98.4 light-years (30.2 parsecs) from Earth.[7] This is a solar twin, with nearly the same characteristics of the Sun.[4] It is more active than the Sun.[8]
Mahdi et al. (2016) named the star the best solar twin candidate out of their dataset of around 2,800 candidates.[4]
