Vfts 243
VFTS 243 (2MASS J05380840-6909190) is an O7V type main sequence star that orbits a stellar mass black hole.
The black hole is around nine times the mass of the Sun, with the blue star being 25 times the mass of the Sun making the star 200,000 times larger than the black hole. VFTS 243 is located in the Large Magellanic Cloud inside NGC 2070 (the Tarantula Nebula) around 160,000 light years from Earth. The binary has an orbital period of 10.4 days.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Dorado |
| Right ascension | 05h 38m 08.407s |
| Declination | −69° 09′ 18.98″ |
| Apparent magnitude (V) | 15.26 |
| Characteristics | |
| Evolutionary stage | main sequence + black hole |
| Spectral type | O7V(n)((f)) |
| Variable type | variable |
| Astrometry | |
| Proper motion (μ) | RA: +1.722 mas/yr Dec.: +0.603 mas/yr |
| Parallax (π) | −0.0468 ± 0.0244 mas |
| Orbit | |
| Period (P) | 10.4031 days |
| Eccentricity (e) | 0.017 |
| Inclination (i) | ≥ 40° |
| Semi-amplitude (K1) (primary) | 81.4 km/s |
| Details | |
| star | |
| Mass | 25 M☉ |
| Radius | 10.3 R☉ |
| Luminosity | 158,000 L☉ |
| Surface gravity (log g) | 3.7 cgs |
| Temperature | 36,000 K |
| Rotational velocity (v sin i) | 181 km/s |
| Age | 7.4 Myr |
| black hole | |
| Mass | 10.1 M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
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