astro.wikisort.org - StarHD 40091, also known as HR 2082, is a solitary star[14] located in the southern constellation Columba, the dove. It has an apparent magnitude of 5.54,[2] making it faintly visible to the naked eye under ideal conditions. Based on parallax measurements from the Gaia spacecraft, the object is estimated to be 501 light years distant.[1] However, it is rapidly receding with a high heliocentric radial velocity of 114 km/s.[6]
Star in the constellation Columba
HD 40091
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
Constellation |
Columba |
Right ascension |
05h 54m 52.48300s[1] |
Declination |
−39° 57′ 28.2946″[1] |
Apparent magnitude (V) |
5.54±0.01[2] |
Characteristics |
Spectral type |
M0 III[3] |
U−B color index |
+1.85[4] |
B−V color index |
+1.51[4] |
Variable type |
suspected[5] |
Astrometry |
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Radial velocity (Rv) | 114±2[6] km/s |
Proper motion (μ) | RA: −11.977 mas/yr[1] Dec.: +21.203 mas/yr[1] |
Parallax (π) | 6.5078 ± 0.1112 mas[1] |
Distance | 501 ± 9 ly (154 ± 3 pc) |
Absolute magnitude (MV) | −0.4[7] |
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Details |
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Mass | 1.21[8] M☉ |
Radius | 52.43[9] R☉ |
Luminosity | 392[10] L☉ |
Surface gravity (log g) | 1.31[8] cgs |
Temperature | 3,969±122[11] K |
Metallicity [Fe/H] | +0.14[8] dex |
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Other designations |
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Database references |
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SIMBAD | data |
This is an evolved red giant with a stellar classification of M0 III.[3] It has 121% the mass of the Sun[8] but has expanded to 52.43 times its girth.[9] It radiates 392 times the luminosity of the Sun[10] from its enlarged photosphere at an effective temperature of 3,969 K,[11] giving it a red hue. HD 40091 is slightly metal enriched, having an iron abundance 38% above solar levels. [8]
HD 40091 is found to vary between 5.64 and 5.68 in the Hipparcos passband, but it is not confirmed to be a variable star. Therefore, it is catalogued in the GCVS as a suspected variable.[5]
References
- Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
- Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
- Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations −40° to −26°. Bibcode:1982mcts.book.....H.
- Oja, T. (1970). "UBV-Fotometri danska Tel (ESO)". Private Communication: 0. Bibcode:1970Priv.........0O.
- Samus’, N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (January 2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. eISSN 1562-6881. ISSN 1063-7729. S2CID 125853869.
- Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.
- Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
- Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. eISSN 1432-0746. ISSN 0004-6361.
- Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (20 December 2021). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics. 657: A7. arXiv:2109.10912. Bibcode:2022A&A...657A...7K. doi:10.1051/0004-6361/202142146. eISSN 1432-0746. ISSN 0004-6361.
- McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711.
- Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.
- Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
- "HD 40091". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 1, 2022.
- Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. eISSN 1365-2966. ISSN 0035-8711.
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