HD 16175
Star in the constellation Andromeda
From Wikipedia, the free encyclopedia
HD 16175 is a 7th magnitude G-type star with temperature about 6,000 K located 196 light-years (60 parsecs) away[2] in the Andromeda constellation. This star is only visible through binoculars or better equipment; it is also 3.3 times more luminous, is 1.34 times more massive, and has a radius 1.66 times bigger than our local star.[6]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Andromeda[1] |
| Right ascension | 02h 37m 01.91118s[2] |
| Declination | +42° 03′ 45.4685″[2] |
| Apparent magnitude (V) | 7.28[3] |
| Characteristics | |
| Evolutionary stage | subgiant[2] |
| Spectral type | F8 IV[4] |
| B−V color index | 0.64[3] |
| Astrometry | |
| Radial velocity (Rv) | 21.83±0.14[2] km/s |
| Proper motion (μ) | RA: −38.864 mas/yr[2] Dec.: −41.234 mas/yr[2] |
| Parallax (π) | 16.6670±0.0279 mas[2] |
| Distance | 195.7 ± 0.3 ly (60.0 ± 0.1 pc) |
| Absolute magnitude (MV) | 3.40[5] |
| Details | |
| Mass | 1.34±0.01[6] M☉ |
| Radius | 1.66±0.04[6] R☉ |
| Luminosity | 3.3±0.01[6] L☉ |
| Surface gravity (log g) | 4.12±0.03[6] cgs |
| Temperature | 6,048±35[6] K |
| Age | 3.2±0.2[6] Gyr |
| Other designations | |
| BD+41°496, HIP 12191, SAO 38170 | |
| Database references | |
| SIMBAD | data |
The star HD 16175 is named Buna. The name was selected in the NameExoWorlds campaign by Ethiopia, during the 100th anniversary of the IAU. Buna is the commonly used word for coffee in Ethiopia.[7][8]
Planetary system
The discovery of the exoplanet HD 16175 b was published in the June 2009 issue of the Publications of the Astronomical Society of the Pacific.[5] The planetary parameters were updated in 2016.[9] In 2023, the inclination and true mass of HD 16175 b were determined via astrometry.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b / Abol | 5.9+1.8 −1.0 MJ |
2.13+0.075 −0.08 |
2.686+0.031 −0.039 |
0.675±0.026 | 59+20 −19 or 121+19 −20° |
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