Astronomy:WOH S281
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Short description: Red supergiant star in the constellation Dorado
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Dorado (LMC) |
| Right ascension | 05h 26m 11.37s |
| Declination | −66° 12′ 11.07″ |
| Apparent magnitude (V) | 14.17 |
| Characteristics | |
| Evolutionary stage | Red supergiant |
| Spectral type | M3 |
| Apparent magnitude (K) | 7.878 |
| Apparent magnitude (R) | 13.42 |
| Apparent magnitude (B) | 16.77 |
| Apparent magnitude (G) | 13.672 |
| Apparent magnitude (J) | 9.376 |
| Apparent magnitude (H) | 8.359 |
| Astrometry | |
| Radial velocity (Rv) | 309.64 km/s |
| Proper motion (μ) | RA: 1.358 mas/yr Dec.: 0.263 mas/yr |
| Details | |
| Radius | 1,376[1][lower-alpha 1] R☉ |
| Luminosity | 179,000[1] L☉ |
| Surface gravity (log g) | +0.5[1] cgs |
| Temperature | 3,200[1] K |
| Other designations | |
WOH S281, IRAS 05261-6614, 2MASS J05261135-6612111, UCAC2 2673201 | |
| Database references | |
| SIMBAD | data |
WOH S281 (IRAS 05261-6614) is a red supergiant located in the constellation of Dorado.[2] It is currently among the largest known stars with a radius of over 1,300 solar radii. If placed at the center of the solar system, its photosphere would engulf the orbit of Jupiter.[1]
See also
Notes
- ↑ The radius is calculated with the Stefan-Boltzmann law, using the bolometric luminosity and effective temperature of WOH S281: [math]\displaystyle{ \sqrt{\left(\frac{5772}{3200}\right)^4\cdot 178966}\approx1376.38 \ R_\odot }[/math]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Groenewegen, Martin A. T.; Sloan, Greg C. (2018). "Luminosities and mass-loss rates of Local Group AGB stars and Red Supergiants". Astronomy & Astrophysics 609: A114. doi:10.1051/0004-6361/201731089. ISSN 0004-6361. Bibcode: 2018A&A...609A.114G.
- ↑ "Simbad (WOH 281)". http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=WOH+S281&submit=SIMBAD+search.
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