54 Cassiopeiae

54 Cassiopeiae
Observation data
Epoch J2000      Equinox J2000
Constellation Cassiopeia[1]
Right ascension 02h 09m 80.26080s[2]
Declination +71° 33′ 07.2268″[2]
Apparent magnitude (V) +6.587[3]
Characteristics
Evolutionary stage Main sequence
Spectral type F8V[4]
Astrometry
Radial velocity (Rv)0.58±0.12[2] km/s
Proper motion (μ) RA: +306.91 mas/yr[2]
Dec.: −239.244 mas/yr[2]
Parallax (π)37.0117 ± 0.0173 mas[2]
Distance88.12 ± 0.04 ly
(27.02 ± 0.01 pc)
Absolute magnitude (MV)+4.42[5]
Details
Mass1.09+0.06
−0.31[6] M☉
Radius1.061[7] R☉
Luminosity1.411[7] L☉
Surface gravity (log g)4.0[8] cgs
Temperature6,039[5] K
Metallicity [Fe/H]+0.25[5] dex
Rotational velocity (v sin i)6[8] km/s
Age2.5[5] Gyr
Other designations
54 Cas, BD+70 163, HD 12800, HIP 10031, G 244-50
Database references
SIMBADdata

54 Cassiopeiae is a star in the northern constellation Cassiopeia. Located 88 ly (27 pc) from Earth,[2] it has an apparent magnitude of 6.59,[3] which makes it hard to be seen by the naked eye even from dark skies. Its absolute magnitude is 4.4.[5] It is a F-type main-sequence star with a stellar classification F8V, currently fusing atoms of hydrogen into helium at its core.[4]

Astrometric measurements by the Gaia spacecraft suggested the presence of a planetary companion to 54 Cassiopeiae, seven times more massive than Jupiter and with an orbital period of 401 days (1.10 years).[9][6] This was later rejected by the Gaia team as a false positive caused by a software error.[10] Radial velocity observations also show no evidence for this planet.[11]

References

  1. ^ Anderson, E.; Francis, Ch. (2012-05-01). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737.
  2. ^ a b c d e f 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.
  3. ^ a b Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S.; Mowlavi, N. (2004-05-01). "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ∼14 000 F and G dwarfs". Astronomy and Astrophysics. 418: 989–1019. arXiv:astro-ph/0405198. Bibcode:2004A&A...418..989N. doi:10.1051/0004-6361:20035959. ISSN 0004-6361.
  4. ^ a b Hinkel, Natalie R.; Mamajek, Eric E.; Turnbull, Margaret C.; Osby, Ella; Shkolnik, Evgenya L.; Smith, Graeme H.; Klimasewski, Alexis; Somers, Garrett; Desch, Steven J. (2017-10-01). "A Catalog of Stellar Unified Properties (CATSUP) for 951 FGK-Stars within 30 pc". The Astrophysical Journal. 848 (1): 34. arXiv:1709.04465. Bibcode:2017ApJ...848...34H. doi:10.3847/1538-4357/aa8b0f. ISSN 0004-637X.
  5. ^ a b c d e Holmberg, J.; Nordström, B.; Andersen, J. (2009-07-01). "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics". Astronomy and Astrophysics. 501 (3): 941–947. arXiv:0811.3982. Bibcode:2009A&A...501..941H. doi:10.1051/0004-6361/200811191. ISSN 0004-6361.
  6. ^ a b Sahlmann, Johannes; Gómez, Pablo (2024-04-14). "Machine learning-based identification of Gaia astrometric exoplanet orbits". arXiv:2404.09350 [astro-ph.EP].
  7. ^ a b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017-10-01). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. ISSN 0035-8711.
  8. ^ a b Latham, David W.; Stefanik, Robert P.; Torres, Guillermo; Davis, Robert J.; Mazeh, Tsevi; Carney, Bruce W.; Laird, John B.; Morse, Jon A. (2002-08-01). "A Survey of Proper-Motion Stars. XVI. Orbital Solutions for 171 Single-lined Spectroscopic Binaries". The Astronomical Journal. 124 (2): 1144–1161. Bibcode:2002AJ....124.1144L. doi:10.1086/341384. ISSN 0004-6256.
  9. ^ Arenou, F.; Babusiaux, C.; et al. (Gaia Collaboration) (June 2023). "Gaia Data Release 3. Stellar multiplicity, a teaser for the hidden treasure". Astronomy & Astrophysics. 674: A34. arXiv:2206.05595. Bibcode:2023A&A...674A..34G. doi:10.1051/0004-6361/202243782.
  10. ^ "Gaia DR3 known issues". ESA. 27 May 2024. Retrieved 4 September 2024. During validation of the astrometric timeseries (epoch astrometry) for Gaia DR4, an error was discovered that had already had an impact on the Gaia DR3 non-single star results [...] The investigation showed that four specific targets suffered of this software bug and that the astrometric-orbit solutions of [...] 54 Cas [...] are false-positives as far as Gaia non-single star processing is concerned.
  11. ^ Sozzetti, Alessandro (July 2024). Ground-based RV follow-up of Gaia DR3 astrometric exoplanet candidates around bright stars. EAS2024, European Astronomical Society Annual Meeting. Bibcode:2024eas..conf.1626S.

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