Astronomy:54 Cassiopeiae
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Short description: Star in the constellation Cassiopeia
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cassiopeia[1] |
| Right ascension | Template:Ra[2] |
| Declination | +71° 33′ 07.2268″[2] |
| Apparent magnitude (V) | +6.587[3] |
| Characteristics | |
| Evolutionary stage | Main sequence[2] |
| Spectral type | F8V[4] |
| Astrometry | |
| Radial velocity (Rv) | 0.58±0.12[2] km/s |
| Proper motion (μ) | RA: +306.91[2] mas/yr Dec.: −239.244[2] mas/yr |
| Parallax (π) | 37.0117 ± 0.0173[2] mas |
| Distance | 88.12 ± 0.04 ly (27.02 ± 0.01 pc) |
| Absolute magnitude (MV) | +4.42[5] |
| Details[6] | |
| Mass | 0.98+0.05 −0.04 M☉ |
| Radius | 1.082±0.024 R☉ |
| Luminosity | 1.36±0.07 L☉ |
| Surface gravity (log g) | 4.26±0.10 cgs |
| Temperature | 6,000±50 K |
| Metallicity | Template:M/H |
| Rotational velocity (v sin i) | 6[7] km/s |
| Age | 5.7+1.7 −1.9 Gyr |
| Other designations | |
| 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
- ↑ Anderson, E.; Francis, Ch. (2012-05-01). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S. et al. (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. doi:10.1051/0004-6361:20035959. ISSN 0004-6361. Bibcode: 2004A&A...418..989N. https://ui.adsabs.harvard.edu/abs/2004A&A...418..989N.
- ↑ 4.0 4.1 Hinkel, Natalie R.; Mamajek, Eric E.; Turnbull, Margaret C.; Osby, Ella; Shkolnik, Evgenya L.; Smith, Graeme H.; Klimasewski, Alexis; Somers, Garrett et al. (2017-10-01). "A Catalog of Stellar Unified Properties (CATSUP) for 951 FGK-Stars within 30 pc". The Astrophysical Journal 848 (1): 34. doi:10.3847/1538-4357/aa8b0f. ISSN 0004-637X. Bibcode: 2017ApJ...848...34H.
- ↑ 5.0 5.1 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. doi:10.1051/0004-6361/200811191. ISSN 0004-6361. Bibcode: 2009A&A...501..941H.
- ↑ 6.0 6.1 Venner, Alexander; Huang, Chelsea X.; Latham, David W.; Quinn, Samuel N.; Bieryla, Allyson; Vanderburg, Andrew; Wittenmyer, Robert A. (2026-03-19). "A Planetary Illusion's Funeral: Non-detection of a Gaia DR3 Exoplanet Candidate, and the Role of Intermediate-precision Radial Velocities in Gaia Exoplanet Follow-up". The Astronomical Journal.
- ↑ 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. doi:10.1086/341384. ISSN 0004-6256. Bibcode: 2002AJ....124.1144L.
- ↑ Arenou, F. et al. (June 2023). "Gaia Data Release 3. Stellar multiplicity, a teaser for the hidden treasure". Astronomy & Astrophysics 674: A34. doi:10.1051/0004-6361/202243782. Bibcode: 2023A&A...674A..34G.
- ↑ 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. doi:10.1093/mnras/staf018.
- ↑ "Gaia DR3 known issues". ESA. 27 May 2024. https://www.cosmos.esa.int/web/gaia/dr3-known-issues. "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."
- ↑ 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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