HD 116029
HD 116029 is a binary star system about 400 light-years away.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Coma Berenices |
| Right ascension | 13h 20m 39.5422s |
| Declination | +24° 38′ 55.3099″ |
| Apparent magnitude (V) | 7.89 |
| Characteristics | |
| Evolutionary stage | subgiant |
| Spectral type | K1IV+M |
| B−V color index | 1.009 |
| Astrometry | |
| Radial velocity (Rv) | -6.42 km/s |
| Proper motion (μ) | RA: -14.495 mas/yr Dec.: -52.193 mas/yr |
| Parallax (π) | 8.0853 ± 0.0384 mas |
| Distance | 403 ± 2 ly (123.7 ± 0.6 pc) |
| Orbit | |
| Primary | HD 116029 A |
| Companion | HD 116029 B |
| Semi-major axis (a) | 1.392" (171 AU) |
| Details | |
| HD 116029 A | |
| Mass | 1.445±0.094 M☉ |
| Radius | 4.6±0.1 R☉ |
| Luminosity | 11.7 L☉ |
| Surface gravity (log g) | 3.40±0.06 cgs |
| Temperature | 4894±36 K |
| Metallicity | 0.12 ± 0.02 |
| Rotational velocity (v sin i) | 1.0±0.6 km/s |
| Age | 2.7±0.5 Gyr |
| HD 116029 B | |
| Mass | 0.26 M☉ |
| Surface gravity (log g) | 5.033±0.019 cgs |
| Other designations | |
| Database references | |
| SIMBAD | data |
The primary subgiant star HD 116029 A belongs to the spectral class K1. Its age is younger than the Sun`s at 2.7±0.5 billion years. The primary star is slightly enriched by heavy elements, having 130% of solar abundance. The primary star does not have detectable flare activity.
In 2016 the co-moving binary stellar companion HD 116029 B was detected. It is a red dwarf star of visual magnitude 16. The companion was confirmed orbiting the primary at a projected separation of 171 AU in 2017.
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