R136a2
The central region of the R136 star cluster as seen in near infrared. R136a1 and R136a2 are the two very close bright stars at the center, with R136a2 being the fainter of the two. Credit: ESO | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Dorado |
| Right ascension | 05h 38m 42.40s |
| Declination | −69° 06′ 02.88″ |
| Apparent magnitude (V) | 12.34 |
| Characteristics | |
| Evolutionary stage | Wolf-Rayet star |
| Spectral type | WN5h |
| B−V color index | 0.23 |
| Astrometry | |
| Distance | 163,000 ly (50,000 pc) |
| Absolute magnitude (MV) | -7.80 |
| Absolute bolometric magnitude (Mbol) | -12.0 |
| Details | |
| Mass | 151+27 −16 M☉ |
| Radius | 25.2+4.1 −3.5 R☉ |
| Luminosity | 3,548,000 L☉ |
| Temperature | 50,000 K |
| Rotational velocity (v sin i) | 150 km/s |
| Age | 1.34+0.13 −0.18 Myr |
| Other designations | |
| MH 511, RMC 136a2, HSH95 5, BAT99 109, CHH92 2 | |
| Database references | |
| SIMBAD | data |
R136a2 (RMC 136a2) is a Wolf-Rayet star residing near the center of the R136, the central concentration of stars of the large NGC 2070 open cluster in the Tarantula Nebula, a massive H II region in the Large Magellanic Cloud which is a nearby satellite galaxy of the Milky Way. It has one of the highest confirmed masses and luminosities of any known star, at about 151 M☉ and 3.5 million L☉ respectively.