HD 127334
Star in the constellation Boötes
From Wikipedia, the free encyclopedia
HD 127334 is a solitary[9] Sun-like star in the northern constellation of Boötes. With an apparent magnitude of 6.36, it can be faintly seen by the naked eye from Earth as a yellow-hued dot of light. As such, it is listed in the Bright Star Catalogue as HR 5423. It is located at a distance of 76.29 light-years (23.39 parsecs) according to Gaia EDR3 parallax measurements.
 | |
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Boötes[1] |
| Right ascension | 14h 29m 36.80877s[2] |
| Declination | +41° 47′ 45.2854″[2] |
| Apparent magnitude (V) | 6.36[3] |
| Characteristics | |
| Spectral type | G5V CH0.3[4] |
| B−V color index | 1.010[3][5] |
| J−H color index | 0.258[6] |
| J−K color index | 0.369[6] |
| Astrometry | |
| Radial velocity (Rv) | −0.401±0.0007[7] km/s |
| Proper motion (μ) | RA: 161.373[2] mas/yr Dec.: −220.361[2] mas/yr |
| Parallax (π) | 42.7526±0.0174 mas[2] |
| Distance | 76.29 ± 0.03 ly (23.390 ± 0.010 pc) |
| Absolute magnitude (MV) | +4.48[1] |
| Details | |
| Mass | 1.02±0.02,[8] 1.07[9] M☉ |
| Radius | 1.2[10] R☉ |
| Luminosity | 1.4[10] L☉ |
| Surface gravity (log g) | 4.37±0.13[11] cgs |
| Temperature | 5758±76,[11] 5635±50[8] K |
| Metallicity [Fe/H] | 0.24±0.06,[11] 0.19±0.04[8] dex |
| Rotational velocity (v sin i) | 7.1[12] km/s |
| Age | 8.6±1.3,[8] 10.5–10.7,[13] ~7.1[12] Gyr |
| Other designations | |
| AG+42°1283, BD+42°2508, GC 19550, GJ 3852, HD 127334, HIP 70873, HR 5423, SAO 45075, PPM 54166, TIC 27525457, TYC 3039-237-1, 2MASS J14293678+4147456, Gaia DR2 1491593733326694912[6] | |
| Database references | |
| SIMBAD | data |
Stellar properties
This is a G-type main-sequence star much like the Sun, with a spectral type of G5V CH0.3,[4] where the suffix notation indicates an anomalous overabundance of the methylidyne radical. It is slightly more massive than the Sun but marginally cooler at 5,758 K (5,485 °C; 9,905 °F) or 5,635 K (5,362 °C; 9,683 °F). The Sun's effective temperature, for comparison, is 5,772 K (5,499 °C; 9,930 °F).[14]
The star belongs to the thin disk population of the Milky Way[13] and is thought to be ancient: its age estimate varies between publications, but generally lies between 7–11 Gyr, much older than the Solar System (aged 4.568 Gyr[15]). Despite its old age, it is enriched in heavy elements, possessing a super-solar metallicity of 0.24±0.06 or 0.19±0.04 dex.
It has a low or very low level of surface activity, unlike some other similar stars such as Toliman (Alpha Centauri B).[3]
HD 127334 has been a long-term target of the California Planet Search,[16] but no exoplanets have been discovered to orbit the star.[11]