Westerlund 1-75
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Ara |
Right ascension | 16h 47m 08.92s[1] |
Declination | −45° 49′ 58.5″[1] |
Apparent magnitude (V) | 16.7 |
Characteristics | |
Evolutionary stage | Red supergiant
|
Spectral type | M1[2] - M4Ia[3] |
Apparent magnitude (J) | 6.933[4] |
Apparent magnitude (H) | 4.673[4] |
Apparent magnitude (K) | 3.28[4] |
Details | |
Radius | 722±36[2] R☉ |
Luminosity | 120,000±14,000[2] L☉ |
Temperature | 3,600[6] - 4,000[2] K |
Other designations | |
Westerlund 1 BKS E, 2MASS J16470892-4549585, Gaia DR3 5940199877892579584 | |
Database references | |
SIMBAD | data |
Westerlund 1 W75 or Wd 1-75 is a red supergiant (RSG) located in the Westerlund 1 super star cluster. Its radius is calculated to be around 668 solar radii[6] (4.65 × 108 km, 3.10 au). This corresponds to a volume 298 million times bigger than the Sun. If placed at the center of the Solar System, Westerlund 1-75 would engulf the inner limits of the asteroid belt.
The star is classified as a luminous cool
Like Westerlund 1-20, Westerlund 1 W26 and Westerlund 1-237, Westerlund 1-75 was observed to be a radio source, however it is weakest along the RSGs in its cluster and remains unresolved at any wavelength.[9]
Westerlund 1-75 is surrounded by extended nebula, although it appears less massive than nebulae around typical red supergiant stars.[10]
See also
Notes
References
- ^ S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ .
- S2CID 14780809.
- ^ Bibcode:2003yCat.2246....0C.
- S2CID 232110879.
- ^ S2CID 53393926.
- ^ "Cl* Westerlund 1 W 75". Simbad.
- ^ Williams, D. R. (2013). "Sun Fact Sheet".
- ISSN 0004-6361.
- S2CID 53640431.