SP77 46-44

Star in the constellation Dorado

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
Radius| 1,278[a] 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

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.

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[edit]

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

( 5772 / 3500 ) 4 ∗ 220 , 830 = 1 , 278.04 R ⊙ {\displaystyle {\sqrt {(5772/3500)^{4}*220,830}}=1,278.04\ R\odot }

## References[edit]

1. ^ Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. Retrieved 16 July 2020.
2. ^ a b c d 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. ^ a b c 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. ^ a b c d 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. ^ a b c Cutri, Roc M.; Skrutskie, Michael F.; Van Dyk, Schuyler D.; Beichman, Charles A.; Carpenter, John M.; Chester, Thomas; Cambresy, Laurent; Evans, Tracey E.; Fowler, John W.; Gizis, John E.; Howard, Elizabeth V.; Huchra, John P.; Jarrett, Thomas H.; Kopan, Eugene L.; Kirkpatrick, J. Davy; Light, Robert M.; Marsh, Kenneth A.; McCallon, Howard L.; Schneider, Stephen E.; Stiening, Rae; Sykes, Matthew J.; Weinberg, Martin D.; Wheaton, William A.; Wheelock, Sherry L.; Zacarias, N. (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.
7. ^ a b c 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.

* v
* t
* e

Constellation of Dorado

* List of stars in Dorado
* Dorado in Chinese astronomy
* Sanduleak -69 202

Stars|

| Bayer|

* α
* β
* γ
* δ
* ε
* ζ
* η1
* η2
* θ
* λ
* ν

|

Variable|

* R
* S
* AB
* BB

HR|

* 2102

HD|

* 27274
* 28254
* 30177
* 33579
* 37974
* 38282
* 269810

Other|

* BAT99-7
* BAT99-66
* BAT99-68
* BAT99-98
* BAT99-104
* BI 253
* Gliese 163
* HE 0437-5439
* HV 888
* IRAS 05280–6910
* LHA 120-S 79
* LH 41-1042
* LH 54-425
* LMC195-1
* Melnick 34
* Melnick 42
* PSR J0523−7125
* PSR J0537−6910
* PSR J0540−6919
* R85
* R136
* a
* a1
* a2
* a3
* b
* c
* R139
* R145
* SP77 46-44
* SGR 0525−66
* TOI 700
* VFTS 102
* VFTS 243
* VFTS 352
* VFTS 682
* WASP-62
* WOH G64
* WOH S279
* WOH S281

| Exoplanets|

* Gliese 163 b
* c
* d
* e
* f
* HD 28254 b
* HD 30177 b

|

Star
clusters|

| NGC|

* 1712
* 1712
* 1755
* 1763
* 1783
* 1806
* 1818
* 1820
* 1846
* 1847
* 1850
* 1852
* 1854/1855
* 1856
* 1858
* 1859
* 1860
* 1866
* 1868
* 1869
* 1871
* 1872
* 1873
* 1898
* 1901
* 1903
* 1910
* 1929
* 1935
* 1955
* 1969
* 1971
* 1974
* 1978
* 1983
* 1984
* 1994
* 1997
* 2002
* 2004
* 2027
* 2040
* 2070
* 2074
* 2100
* 2108
* 2164
* 2197
* 2241
* 2257

|

Other|

* Hodge 301
* LH 95

Nebulae|

| NGC|

* 1934
* 1936
* 2014
* 2020
* 2029
* 2032
* 2060
* 2080

|

Other|

* Honeycomb Nebula
* N119
* N180B
* N11
* N41
* N44
* N49
* N55
* SNR 0509-67.5
* Tarantula Nebula

Galaxies|

| NGC|

* 1533
* 1549
* 1553
* 1566
* 1672
* 1892
* 2082

|

Other|

* Large Magellanic Cloud (partly in Mensa)
* LEDA 89996

| Galaxy clusters|

* Dorado Group
* NGC 1566 Group

|

| Astronomical events|

* GRB 790305b
* SN 1987A

|

Category

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*[Dec.:]: Declination
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