Astronomy:HD 217382
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Short description: Star in the constellation Cepheus
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cepheus[1] |
| Right ascension | 22h 47m 24.97075s[2] |
| Declination | +84° 20′ 46.2312″[2] |
| Apparent magnitude (V) | 4.70[1] |
| Characteristics | |
| Spectral type | K4 III[3] |
| B−V color index | 1.418±0.001[1] |
| Astrometry | |
| Radial velocity (Rv) | +2.57±0.13[2] km/s |
| Proper motion (μ) | RA: +98.346[2] mas/yr Dec.: +24.049[2] mas/yr |
| Parallax (π) | 8.7418 ± 0.0818[2] mas |
| Distance | 373 ± 3 ly (114 ± 1 pc) |
| Absolute magnitude (MV) | −0.49[1] |
| Details | |
| Mass | 1.24[4] M☉ |
| Radius | 31[5] R☉ |
| Luminosity | 286[5] L☉ |
| Surface gravity (log g) | 1.31[6] cgs |
| Temperature | 4,236[5] K |
| Metallicity [Fe/H] | −0.09[6] dex |
| Rotational velocity (v sin i) | 1.0[7] km/s |
| Age | 2.9[8] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 217382 is a suspected binary star[10] system in the northern circumpolar constellation of Cepheus. It is faintly visible to the naked eye with an apparent visual magnitude of 4.70.[1] The distance to HD 217382 is around 373 light years, as determined from an annual parallax shift of 8.74 mas. The system is moving further away with a heliocentric radial velocity of +2.6 km/s.[2] It is a candidate member of the Hyades supercluster and has a peculiar velocity of 9.2 km/s.[11]
The visible component of this system is an evolved K-type giant star with a stellar classification of K4 III.[3] It is a periodic variable with a frequency of a cycle every 10.64724 days and an amplitude of 0.0041 in magnitude.[3] The star has an estimated 31 times the radius of the Sun and is radiating 286 times the Sun's luminosity from its enlarged photosphere at an effective temperature of about 4,236 K.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 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 3.2 Koen, Chris; Eyer, Laurent (2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society 331 (1): 45–59, doi:10.1046/j.1365-8711.2002.05150.x, Bibcode: 2002MNRAS.331...45K.
- ↑ Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G. et al. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics 691: A98. doi:10.1051/0004-6361/202451427. Bibcode: 2024A&A...691A..98K.
- ↑ 5.0 5.1 5.2 5.3 Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel et al. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series 268 (1): 4. doi:10.3847/1538-4365/acdee5. Bibcode: 2023ApJS..268....4F.
- ↑ 6.0 6.1 Matsuno, Tadafumi; Starkenburg, Else; Balbinot, Eduardo; Helmi, Amina (2024). "Improving metallicity estimates for very metal-poor stars in the Gaia DR3 GSP-Spec catalog". Astronomy and Astrophysics 685: A59. doi:10.1051/0004-6361/202245762. Bibcode: 2024A&A...685A..59M.
- ↑ De Medeiros, J. R. et al. (October 2002), "The Rotation of Binary Systems with Evolved Components", The Astrophysical Journal 578 (2): 943–950, doi:10.1086/342613, Bibcode: 2002ApJ...578..943D.
- ↑ Kordopatis, G.; Schultheis, M.; McMillan, P. J.; Palicio, P. A.; De Laverny, P.; Recio-Blanco, A.; Creevey, O.; Álvarez, M. A. et al. (2023). "Stellar ages, masses, extinctions, and orbital parameters based on spectroscopic parameters of Gaia DR3". Astronomy and Astrophysics 669: A104. doi:10.1051/0004-6361/202244283. Bibcode: 2023A&A...669A.104K.
- ↑ "HD 217382". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+217382.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Montes, D. et al. (November 2001), "Late-type members of young stellar kinematic groups - I. Single stars", Monthly Notices of the Royal Astronomical Society 328 (1): 45–63, doi:10.1046/j.1365-8711.2001.04781.x, Bibcode: 2001MNRAS.328...45M.
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