XX Persei

XX Persei
XX Persei (circled) near the Double Cluster and Comet Lovejoy
Credit: Juan lacruz
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 02h 03m 09.35854s[1]
Declination 55° 13′ 56.6229″[1]
Apparent magnitude (V) 7.9 - 9.0[2]
Characteristics
Evolutionary stage Red supergiant
Spectral type M4Ib + B7V[3]
Variable type SRc[4]
Astrometry
Proper motion (μ) RA: −1.263[1] mas/yr
Dec.: −1.819[1] mas/yr
Parallax (π)0.3980 ± 0.0316 mas[1]
Distance6,614+1,060
−812 ly
(2,029+325
−249 pc)[5]
Absolute magnitude (MV)−4.6[6]
Details
Mass16[6] M☉
Radius718+80
−56[7] R☉
Luminosity42,000[8] L☉
Temperature3,339[5] K
Other designations
XX Per, BD+54°444, GSC 03689-01837, HD 12401, HIP 9582, IRC+50052, 2MASS J02030935+5513566, HV 3414, SAO 22875, AAVSO 0156+54
Database references
SIMBADdata

XX Persei (IRC +50052 / HIP 9582 / BD+54°444) is a semiregular variable red supergiant star in the constellation Perseus, between the Double Cluster and the border with Andromeda.

  1. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ Cite error: The named reference kiss was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference proust was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).
  5. ^ a b Norris, Ryan P. (2019). Seeing Stars Like Never Before: A Long-term Interferometric Imaging Survey of Red Supergiants (PDF) (PhD). Georgia State University.
  6. ^ a b Cite error: The named reference stothers was invoked but never defined (see the help page).
  7. ^ Ryan Norris. "Student Science at NMT: Learning Optical Interferometry Through Projects on Evolved Stars" (PDF). CHARA.
  8. ^ Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal. 158 (1): 20. arXiv:1905.03744. Bibcode:2019AJ....158...20M. doi:10.3847/1538-3881/ab1cbd. S2CID 148571616.