MY Cephei

Not to be confused with Mu Cephei.
MY Cephei

MY Cephei is the brightest star in this infrared image of NGC 7419.
Credit: 2MASS
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cepheus
Right ascension 22h 54m 31.698s[1]
Declination +60° 49′ 38.97″[1]
Apparent magnitude (V) 14.4–15.5[2]
Characteristics
Evolutionary stage Extreme[3] OH/IR red supergiant[4]
Spectral type M3,[5] M7–7.5 I[6] (M6–7Iab[2])
Apparent magnitude (G) 10.225[1]
Apparent magnitude (H) 2.98[7]
Apparent magnitude (K) 2.14[7]
Variable type SRc[2]
Astrometry
Proper motion (μ) RA: –2.637[1] mas/yr
Dec.: –1.883[1] mas/yr
Parallax (π)0.3398 ± 0.0708 mas[1]
Distance3,000+350
−290[8] pc
Details
Mass14.5[9] M☉
Radius1,028 ± 169 – 1,138 ± 387[5][a] R☉
Luminosity159,000+60,000
−44,000 – 195,000+173,000
−92,000[5][b] L☉
Temperature3,595±31[5] K
Age9[6] Myr
Other designations
MY Cep, IRC +60375, 2MASS J22543171+6049388, IRAS 22525+6033, RAFGL 2987
Database references
SIMBADdata

MY Cephei (IRC +60375) is a red supergiant located in open cluster NGC 7419 in the constellation of Cepheus. It is a semiregular variable star with a maximum brightness of magnitude 14.4 and a minimum of magnitude 15.5.

  1. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. ^ a b c "GCVS Query=MY Cep". General Catalogue of Variable Stars @ Sternberg Astronomical Institute, Moscow, Russia. Retrieved 2020-08-06.
  3. ^ Davies, Ben; Beasor, Emma R. (2019). "The distances to star clusters hosting Red Supergiants: χ per, NGC 7419, and Westerlund 1". Monthly Notices of the Royal Astronomical Society: Letters. 486: L10–L14. arXiv:1903.12506. doi:10.1093/mnrasl/slz050. S2CID 88517447.
  4. ^ Beauchamp, Alain; Moffat, Anthony F. J.; Drissen, Laurent (1994). "The galactic open cluster NGC 7419 and its five red supergiants". Astrophysical Journal Supplement Series. 93: 187. Bibcode:1994ApJS...93..187B. doi:10.1086/192051.
  5. ^ a b c d Cite error: The named reference messineo2021 was invoked but never defined (see the help page).
  6. ^ a b Humphreys, Roberta M.; Helmel, Greta; Jones, Terry J.; Gordon, Michael S. (August 2020). "Exploring the Mass Loss Histories of the Red Supergiants". The Astronomical Journal. 160 (3): 145. arXiv:2008.01108. Bibcode:2020AJ....160..145H. doi:10.3847/1538-3881/abab15. S2CID 220961677.
  7. ^ a b 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.
  8. ^ Cite error: The named reference Davies2020 was invoked but never defined (see the help page).
  9. ^ Marco, A.; Negueruela, I. (2013). "NGC 7419 as a template for red supergiant clusters". Astronomy & Astrophysics. 552: A92. arXiv:1302.5649. Bibcode:2013A&A...552A..92M. doi:10.1051/0004-6361/201220750. S2CID 53723223.


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