HD 18262 (HR 870, HIP 13679) is an F-type giant or subgiant star located in the constellation Cetus. It has an apparent magnitude of 5.963, which makes it faintly visible to the naked eye. According to the Gaia spacecraft, HD 18262 is located at a distance of 43.79 parsecs (142.8 light-years) and is moving away from Earth at a velocity of 27.4 km/s. Considering the apparent magnitude and the distance, its absolute magnitude is equivalent to 2.79. It belongs to the thin disk population of the Milky Way.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 02h 56m 13.767s[1] |
| Declination | +08° 22′ 53.62″[1] |
| Apparent magnitude (V) | 5.963[1] |
| Characteristics | |
| Evolutionary stage | Subgiant to giant star |
| Spectral type | F6III-IVs[1] |
| Apparent magnitude (B) | 6.431±0.015[1] |
| Apparent magnitude (G) | 5.861±0.003[1] |
| Apparent magnitude (J) | 5.134±0.037[1] |
| Apparent magnitude (H) | 4.934±0.098[1] |
| Apparent magnitude (K) | 4.845±0.02[1] |
| B−V color index | 0.437[2] |
| Astrometry | |
| Radial velocity (Rv) | 27.38±0.15[3] km/s |
| Proper motion (μ) | RA: 111.39 mas/yr[3] Dec.: -89.435 mas/yr[3] |
| Parallax (π) | 23.1485 ± 0.0873 mas[3] |
| Distance | 142.766 ly (43.7931 pc)[3] |
| Absolute magnitude (MV) | 2.79[4] |
| Details | |
| Mass | 1.54±0.03[5] M☉ |
| Radius | 1.996[6] R☉ |
| Luminosity | 6.017[6] L☉ |
| Surface gravity (log g) | 4.19[7] cgs |
| Temperature | 6404[6] K |
| Metallicity [Fe/H] | 0.358[7] dex |
| Rotational velocity (v sin i) | 8.26[7] km/s |
| Age | 1.64+0.29 −0.22[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Characteristics
editIt is an evolved F-type star that has left the main sequence and is now between a giant star and a subgiant, based on its spectral type of F6III-IVs.[1][8] The star is 1.54 times more massive than the Sun[5] and has expanded to 2 times its size.[6] It is emitting six times the solar luminosity from its photosphere at an effective temperature of 6,400 K,[6] which is around 630 degrees hotter than the Sun's photosphere. The age of HD 18262 is estimated at 1.64 billion years,[5] equivalent to 36% of the Solar System's age. The star is metal-enriched compared to the Sun, the abundance of iron [Fe/H] on its surface is 2.3 higher than that of the Sun, while the oxygen abundance [O/H] is 2.9 times higher.[7][a] Its B-V color index is 0.437,[2] giving it the yellowish-white color of a F-type star.
The distance to HD 18262, based on information from the Gaia spacecraft, is of 43.79 parsecs (142.8 light-years).[3] The apparent magnitude of the star is of 5.96m,[1] which is bright enough to be seen to the naked eye under dark sites, far away from light pollution.[9] The absolute magnitude, i.e. its brightness if it was seen at a distance of 10 parsecs (32.6 ly), is of 2.79.[4] HD 18262 is moving away from Earth at a velocity of 27.38 km/s.[1] It is part of the thin disk population of the Milky Way.[10] Its orbit around the galaxy has a low eccentricity of 0.06 and its distance from the galactic center varies from 7.14 to 8.11 kiloparsecs (23,280 to 26,440 light-years).[11]
No debris disks have been detected around this star as of 2016[12] and no exoplanets have been detected around it as of 2012.[10] A 2019 study analysed the possibility of HD 18262 hosting a giant planet, in five ensembles, analysing five different compositions. The highest possibity was in the second ensemble, where the planet would be formed by volatiles, lithophiles, and sderophiles. In this case, the possibility is of 23%.[13] HD 18262's habitable zone is located at a mean distance of 2.44 astronomical units from it.[14]
Notes
edit- ^ from logarithms of 0.358 and 0.46 respectively.
References
edit- ^ a b c d e f g h i j k l "HD 18262". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved May 8, 2024.
- ^ a b Isaacson, Howard; Fischer, Debra (2010-12-01). "Chromospheric Activity and Jitter Measurements for 2630 Stars on the California Planet Search". The Astrophysical Journal. 725 (1): 875–885. arXiv:1009.2301. Bibcode:2010ApJ...725..875I. doi:10.1088/0004-637X/725/1/875. ISSN 0004-637X. Data about this star is available here at VizieR.
- ^ a b c d e 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.
- ^ a b Ford, Dominic. "HIP-13679 (Star)". In-The-Sky.org. Retrieved 2024-05-08.
- ^ a b c d Aguilera-Gómez, Claudia; Ramírez, Iván; Chanamé, Julio (2018-06-01). "Lithium abundance patterns of late-F stars: an in-depth analysis of the lithium desert". Astronomy and Astrophysics. 614: A55. arXiv:1803.05922. Bibcode:2018A&A...614A..55A. doi:10.1051/0004-6361/201732209. ISSN 0004-6361. Data about this star is available here at VizieR.
- ^ a b c d e Schofield, Mathew; Chaplin, William J.; Huber, Daniel; Campante, Tiago L.; Davies, Guy R.; Miglio, Andrea; Ball, Warrick H.; Appourchaux, Thierry; Basu, Sarbani; Bedding, Timothy R.; Christensen-Dalsgaard, Jørgen; Creevey, Orlagh; García, Rafael A.; Handberg, Rasmus; Kawaler, Steven D. (2019-03-01). "The Asteroseismic Target List for Solar-like Oscillators Observed in 2 minute Cadence with the Transiting Exoplanet Survey Satellite". The Astrophysical Journal Supplement Series. 241 (1): 12. arXiv:1901.10148. Bibcode:2019ApJS..241...12S. doi:10.3847/1538-4365/ab04f5. ISSN 0067-0049. Data about this star is available here at VizieR.
- ^ a b c d Rice, Malena; Brewer, John M. (2020-08-01). "Stellar Characterization of Keck HIRES Spectra with The Cannon". The Astrophysical Journal. 898 (2): 119. arXiv:2007.02942. Bibcode:2020ApJ...898..119R. doi:10.3847/1538-4357/ab9f96. ISSN 0004-637X. Data about this star is available here at VizieR.
- ^ "The Classification of Stellar Spectra". www.star.ucl.ac.uk. Retrieved 2024-05-08.
- ^ "Determining the Limiting Magnitude – Saguaro Astronomy Club". www.saguaroastro.org. Retrieved 2024-05-08.
- ^ a b Ramírez, I.; Fish, J. R.; Lambert, D. L.; Allende Prieto, C. (2012-09-01). "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets". The Astrophysical Journal. 756 (1): 46. arXiv:1207.0499. Bibcode:2012ApJ...756...46R. doi:10.1088/0004-637X/756/1/46. hdl:2152/34872. ISSN 0004-637X. Data about this star is available here at VizieR.
- ^ Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (2011-06-01). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy and Astrophysics. 530: A138. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. ISSN 0004-6361. Data about this star is available here at VizieR.
- ^ Gáspár, András; Rieke, George H.; Ballering, Nicholas (2016-08-01). "The Correlation between Metallicity and Debris Disk Mass". The Astrophysical Journal. 826 (2): 171. arXiv:1604.07403. Bibcode:2016ApJ...826..171G. doi:10.3847/0004-637X/826/2/171. ISSN 0004-637X. Data about this star is available here at VizieR.
- ^ Hinkel, Natalie R.; Unterborn, Cayman; Kane, Stephen R.; Somers, Garrett; Galvez, Richard (2019-07-01). "A Recommendation Algorithm to Predict Giant Exoplanet Host Stars Using Stellar Elemental Abundances". The Astrophysical Journal. 880 (1): 49. arXiv:1805.12144. Bibcode:2019ApJ...880...49H. doi:10.3847/1538-4357/ab27c0. ISSN 0004-637X. Data about this star is available here at VizieR.
- ^ Reiners, Ansgar; Zechmeister, Mathias (2020-03-01). "Radial Velocity Photon Limits for the Dwarf Stars of Spectral Classes F-M". The Astrophysical Journal Supplement Series. 247 (1): 11. arXiv:1912.04120. Bibcode:2020ApJS..247...11R. doi:10.3847/1538-4365/ab609f. ISSN 0067-0049. Data about this star is available here at VizieR.