WOH S281

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]

WOH S281

Observation data Epoch J2000      Equinox
Constellation	Dorado (LMC)
Right ascension	05^h 26^m 11.37^s
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

See also

• WOH G17
• WOH G64
• WOH S140 (HV 888)
• WOH S279
• List of largest stars

Notes

1. The radius is calculated with the Stefan-Boltzmann law, using the bolometric luminosity and effective temperature of WOH S281: ${\displaystyle {\sqrt {\left({\frac {5772}{3200}}\right)^{4}\cdot 178966}}\approx 1376.38\ R_{\odot }}$

References

1. 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.
2. "Simbad (WOH 281)".