W Andromedae

W Andromedae is a variable star in the constellation of Andromeda. It is classified as a Mira variable and S-type star,[5] and varies from an apparent visual magnitude of 14.6 at minimum brightness to a magnitude of 6.7 at maximum brightness, with a period of approximately 397.3 days.[2] The star is losing mass due to stellar winds at a rate of 2.79×10−7 M☉/yr.[4]

W Andromedae
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 02h 17m 32.96122s[1]
Declination +44° 18′ 17.7573″[1]
Apparent magnitude (V) 6.7 – 14.6 variable [2]
Characteristics
Spectral type S6,1e-S9,2e[2]
Variable type Mira[2]
Astrometry
Radial velocity (Rv)−38.19±0.4[3] km/s
Proper motion (μ) RA: −0.162[1] mas/yr
Dec.: −2.516[1] mas/yr
Parallax (π)2.2125 ± 0.0953[1] mas
Distance1,470 ± 60 ly
(450 ± 20 pc)
Absolute magnitude (MV)-5.27[4]
Other designations
HD 14028, BD+43 461a, HIP 10687, HR 663.
Database references
SIMBADdata

References
  1. Brown, A. G. A.; et al. (Gaia collaboration). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics (in press). arXiv:2012.01533. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
  2. W And, database entry, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250 Accessed on line 2009-06-22.
  3. Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (December 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 340: 165–186. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272.
  4. Guandalini, R. (April 2010). "Infrared photometry and evolution of mass-losing AGB stars. III. Mass loss rates of MS and S stars". Astronomy and Astrophysics. 513: A4. arXiv:1002.2458. Bibcode:2010A&A...513A...4G. doi:10.1051/0004-6361/200911764. S2CID 119193286.
  5. International Variable Star Index, Accessed 2012-01-19


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