Sp77 46-44

SP77 46-44
Observation data; Equinox J2000.0]] (ICRS)
Constellation	Dorado
Right ascension	05h 29m 42.2038s
Declination	−68° 57′ 17.351″
Apparent magnitude (V)	11.54 (var.)
Characteristics
Evolutionary stage	Red supergiant
Spectral type	M2.5 Ia-Iab
Apparent magnitude (B)	14.04
Apparent magnitude (V)	12.15
Apparent magnitude (R)	10.99
Apparent magnitude (J)	7.922±0.024
Apparent magnitude (H)	7.192±0.047
Apparent magnitude (K)	6.886±0.029
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
Astrometry
Radial velocity (Rv)	273.0±0.3 km/s
Proper motion (μ)	RA: 1.445 mas/yr ; Dec.: 0.463 mas/yr
Details
Radius	1,278 R☉
Luminosity	221,000 – 251,000 L☉
Surface gravity (log g)	0.5 cgs
Temperature	3,500 K
Other designations
	SP77 46-44, WOH S341, W60 A27, 2MASS J05294221-6857173
Database references
SIMBAD	data

Short description: Star in the constellation Dorado

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 the Solar System, its photosphere would engulf the orbit of Jupiter.

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

↑ Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K:
[math]\displaystyle{ \sqrt{(5772/3500)^4 * 220,830} = 1,278.04\ R\odot }[/math]

References

↑ Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. http://djm.cc/constellation.html. Retrieved 16 July 2020.
↑ ^2.0 ^2.1 ^2.2 ^2.3 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
↑ ^3.0 ^3.1 ^3.2 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. doi:10.1088/0004-6256/140/1/14. Bibcode: 2010AJ....140...14S.
↑ González-Fernández, Carlos; Dorda, Ricardo; Negueruela, Ignacio; Marco, Amparo (2015). "A new survey of cool supergiants in the Magellanic Clouds". Astronomy & Astrophysics 578: A3. doi:10.1051/0004-6361/201425362. Bibcode: 2015A&A...578A...3G.
↑ ^5.0 ^5.1 ^5.2 ^5.3 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. doi:10.1086/379558. Bibcode: 2003AJ....126.2867M.
↑ ^6.0 ^6.1 ^6.2 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E. et al. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues 2246: II/246. Bibcode: 2003yCat.2246....0C. http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=II/246.
↑ ^7.0 ^7.1 ^7.2 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.
↑ 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. doi:10.1093/mnras/sty1302. Bibcode: 2018MNRAS.478.3138D.
↑ "[W60 A27 -- Red supergiant star"]. SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=SP77+46-44. Retrieved 1 August 2020.
↑ Samus, N. N. 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.

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(0 votes)

[RadiusCalculationFromTemperatureLuminosity-7] Applying the Stefan–Boltzmann law with a nominal solar effective temperature of 5,772 K:
[math]\displaystyle{ \sqrt{(5772/3500)^4 * 220,830} = 1,278.04\ R\odot }[/math]

[DJM-2008-1] Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. http://djm.cc/constellation.html. Retrieved 16 July 2020.

[dr2-2] 2.0 ^2.1 ^2.2 ^2.3 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.

[szczygiel2010-3] 3.0 ^3.1 ^3.2 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. doi:10.1088/0004-6256/140/1/14. Bibcode: 2010AJ....140...14S.

[rv-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. doi:10.1051/0004-6361/201425362. Bibcode: 2015A&A...578A...3G.

[massey2003-5] 5.0 ^5.1 ^5.2 ^5.3 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. doi:10.1086/379558. Bibcode: 2003AJ....126.2867M.

[2mass-6] 6.0 ^6.1 ^6.2 Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E. et al. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues 2246: II/246. Bibcode: 2003yCat.2246....0C. http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=II/246.

[groenewegen2018-8] 7.0 ^7.1 ^7.2 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.

[davies2018-9] 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. doi:10.1093/mnras/sty1302. Bibcode: 2018MNRAS.478.3138D.

[SIMBAD-10] "[W60 A27 -- Red supergiant star"]. SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=SP77+46-44. Retrieved 1 August 2020.

[gcvs-11] Samus, N. N. 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.

Observation data Equinox J2000.0]] (ICRS)
Constellation	Dorado^[1]
Right ascension	05^h 29^m 42.2038^s^[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 (R_v)	273.0±0.3^[5] km/s
Proper motion (μ)	RA: 1.445^[2] mas/yr Dec.: 0.463^[2] mas/yr

Details

Radius	1,278^{[lower-alpha 1]} `R`_☉
Luminosity	221,000^[7] – 251,000^[8] `L`_☉
Surface gravity (log g)	0.5^[7] cgs
Temperature	3,500^[7] K

Other designations
SP77 46-44, WOH S341, W60 A27, 2MASS J05294221-6857173^[9]
Database references
SIMBAD	data