Back نظام ثنائي Gaia BH1 Arabic Gaia BH1 German گایا بیاچ۱ Persian Gaia BH1 French Gaia BH1 Japanese Гаја BH1 Macedonian Gaia BH1 Polish Gaia BH1 Russian Gaia BH1 Swedish Gaia BH1 Turkish
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus[1] |
| Right ascension | 17h 28m 41.09661s[2] |
| Declination | −00° 34′ 51.5234″[2] |
| Characteristics | |
| Sun-like star | |
| Evolutionary stage | Main sequence |
| Spectral type | G[3] |
| Apparent magnitude (G) | 13.77[3] |
| Black hole | |
| Evolutionary stage | Stellar black hole |
| Astrometry | |
| Radial velocity (Rv) | 23.03±2.63[2] km/s |
| Proper motion (μ) | RA: −7.70±0.020 mas/yr[3] Dec.: −25.85±0.027 mas/yr[3] |
| Parallax (π) | 2.09 ± 0.02 mas[3] |
| Distance | 1,560 ± 10 ly (478 ± 5 pc) |
| Orbit[3] | |
| Period (P) | 185.59±0.05 d |
| Semi-major axis (a) | 1.40±0.01 AU |
| Eccentricity (e) | 0.451±0.005 |
| Inclination (i) | 126.6±0.4° |
| Longitude of the node (Ω) | 97.8±1.0° |
| Periastron epoch (T) | 2457387.9±0.7 |
| Argument of periastron (ω) (secondary) | 12.8±1.1° |
| Details[3] | |
| Sun-like star | |
| Mass | 0.93±0.05 M☉ |
| Radius | 0.99±0.05 R☉ |
| Luminosity (bolometric) | 1.06±0.04 L☉ |
| Surface gravity (log g) | 4.55±0.16 cgs |
| Temperature | 5850±50 K |
| Metallicity [Fe/H] | −0.2±0.05 dex |
| Rotational velocity (v sin i) | <3.5 km/s |
| Black hole | |
| Mass | 9.62±0.18 M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
Gaia BH1 (Gaia DR3 4373465352415301632) is a binary system consisting of a G-type main-sequence star and a likely stellar-mass black hole, located about 1,560 light-years (478 pc) away from the Solar System in the constellation of Ophiuchus.[4] As of May 2024[update], it is the nearest known system that astronomers are reasonably confident contains a black hole, followed by Gaia BH3, Gaia BH2 and A0620-00.[3][5]
- ^ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
- ^ a b c Cite error: The named reference
GaiaDR3was invoked but never defined (see the help page). - ^ a b c d e f g h Cite error: The named reference
El-Badry2022was invoked but never defined (see the help page). - ^ Overbye, Dennis (5 November 2022). "Astronomers Find a Black Hole in Our Cosmic Back Yard - Just 1,600 light-years away, the black hole is the closest known to Earth. The good news: It's dormant, at least for now". The New York Times. Retrieved 6 November 2022.
- ^ Cite error: The named reference
NOIRLab2227was invoked but never defined (see the help page).