SP77 46-44

SP77 46-44 (WOH S341) is a red supergiant star found in the Large Magellanic Cloud in the constellation of Dorado. It is one of the largest stars discovered, with a radius over 1,200 solar radii. If placed in our solar system, its photosphere would engulf the orbit of Jupiter.

SP77 46-44
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Dorado[1]
Right ascension 05h 29m 42.2038s[2]
Declination −68° 57′ 17.351″[2]
Apparent magnitude (V) 11.54 (var.)[3]
Characteristics
Evolutionary stage Red supergiant
Spectral type M2.5 Ia-Iab[4]
Apparent magnitude (B) 14.04[5]
Apparent magnitude (V) 12.15[5]
Apparent magnitude (R) 10.99[5]
Apparent magnitude (J) 7.922±0.024[6]
Apparent magnitude (H) 7.192±0.047[6]
Apparent magnitude (K) 6.886±0.029[6]
B−V color index 1.89
V−R color index 1.16
J−H color index 0.730
J−K color index 1.036
Variable type yes[3]
Astrometry
Radial velocity (Rv)273.0±0.3[5] km/s
Proper motion (μ) RA: 1.445[2] mas/yr
Dec.: 0.463[2] mas/yr
Details
Radius1,278[lower-alpha 1] R☉
Luminosity221,000[7] – 251,000[8] L☉
Surface gravity (log g)0.5[7] cgs
Temperature3,500[7] K
Other designations
SP77 46-44, WOH S341, W60 A27, 2MASS J05294221-6857173[9]
Database references
SIMBADdata

The apparent magnitude of SP77 46-44 varies by about 0.8 magnitudes around 11.5.[3] No variable star classification has been assigned.[10]

Notes
  1. Applying the Stefan-Boltzmann law with a nominal solar effective temperature of 5,772 K:

References
  1. Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. Retrieved 16 July 2020.
  2. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  3. Szczygieł, D. M.; Stanek, K. Z.; Bonanos, A. Z.; Pojmański, G.; Pilecki, B.; Prieto, J. L. (2010). "Variability of Luminous Stars in the Large Magellanic Cloud Using 10 Years of ASAS Data". The Astronomical Journal. 140 (1): 14. arXiv:1001.3410. Bibcode:2010AJ....140...14S. doi:10.1088/0004-6256/140/1/14. S2CID 119108199.
  4. González-Fernández, Carlos; Dorda, Ricardo; Negueruela, Ignacio; Marco, Amparo (2015). "A new survey of cool supergiants in the Magellanic Clouds". Astronomy & Astrophysics. 578: A3. arXiv:1504.00003. Bibcode:2015A&A...578A...3G. doi:10.1051/0004-6361/201425362. S2CID 55959019.
  5. Massey, Philip; Olsen, K. A. G. (2003). "The Evolution of Massive Stars. I. Red Supergiants in the Magellanic Clouds". The Astronomical Journal. 126 (6): 2867–2886. arXiv:astro-ph/0309272. Bibcode:2003AJ....126.2867M. doi:10.1086/379558. S2CID 119476272.
  6. Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". VizieR On-line Data Catalog. Bibcode:2003yCat.2246....0C.
  7. 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. arXiv:1711.07803. Bibcode:2018A&A...609A.114G. doi:10.1051/0004-6361/201731089. ISSN 0004-6361. S2CID 59327105.
  8. Davies, Ben; Crowther, Paul A.; Beasor, Emma R. (2018). "The luminosities of cool supergiants in the Magellanic Clouds, and the Humphreys–Davidson limit revisited". Monthly Notices of the Royal Astronomical Society. 478 (3): 3138–3148. arXiv:1804.06417. Bibcode:2018MNRAS.478.3138D. doi:10.1093/mnras/sty1302. S2CID 59459492.
  9. "[W60] A27 -- Red supergiant star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 1 August 2020.
  10. Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.