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54 Cassiopeiae

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Star in the constellation Cassiopeia
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54 Cassiopeiae
Observation data
Epoch J2000Equinox J2000
Constellation Cassiopeia [1]
Right ascension 02h 09m 80.26080s[2]
Declination +71°33′07.2268′′[2]
Apparentmagnitude(V) +6.587[3]
Characteristics
Evolutionarystage Main sequence [2]
Spectraltype 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±0.0173mas [2]
Distance 88.12 ± 0.04ly
(27.02 ± 0.01pc)
Absolutemagnitude(MV)+4.42[5]
Details[6]
Mass 0.98+0.05
−0.04M☉
Radius 1.082±0.024R☉
Luminosity 1.36±0.07L☉
Surface gravity (logg)4.26±0.10cgs
Temperature 6,000±50K
Metallicity [ M / H ] {\displaystyle {\begin{smallmatrix}\left[{\ce {M}}/{\ce {H}}\right]\end{smallmatrix}}} {\displaystyle {\begin{smallmatrix}\left[{\mathrm {M} }/{\mathrm {H} }\right]\end{smallmatrix}}}= −0.24±0.08
Rotational velocity (vsini)6[7] km/s
Age 5.7+1.7
−1.9Gyr
Other designations
54 Cas, BD+70 163, HD 12800, HIP 10031, G 244-50
Database references
SIMBAD data

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).[8] [9] 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] [6]

References

[edit ]
  1. ↑ Anderson, E.; Francis, Ch. (2012年05月01日). "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. 1 2 3 4 5 6 7 8 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. 1 2 Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S.; Mowlavi, N. (2004年05月01日). "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. 1 2 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年10月01日). "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. 1 2 Holmberg, J.; Nordström, B.; Andersen, J. (2009年07月01日). "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. 1 2 Venner, Alexander; Huang, Chelsea X.; Latham, David W.; Quinn, Samuel N.; Bieryla, Allyson; Vanderburg, Andrew; Wittenmyer, Robert A. (2026年04月10日). "A Planetary Illusion's Funeral: Nondetection of a Gaia DR3 Exoplanet Candidate, and the Role of Intermediate-precision Radial Velocities in Gaia Exoplanet Follow-up". The Astronomical Journal. 171 (5): 279. arXiv:2603.19402 . doi:10.3847/1538-3881/ae4e2b . ISSN 0004-6256.
  7. ↑ Latham, David W.; Stefanik, Robert P.; Torres, Guillermo; Davis, Robert J.; Mazeh, Tsevi; Carney, Bruce W.; Laird, John B.; Morse, Jon A. (2002年08月01日). "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.
  8. ↑ 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.
  9. ↑ Sahlmann, Johannes; Gómez, Pablo (2025). "Machine learning-based identification of Gaia astrometric exoplanet orbits". Monthly Notices of the Royal Astronomical Society. 537 (2): 1130–1145. arXiv:2404.09350 . doi:10.1093/mnras/staf018 .
  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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