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HD 91496 (HR 4142) is a giant star in the constellation Carina, with an apparent magnitude is 4.92 and an MK spectral class of K4/5 III. It has been suspected of varying in brightness, but this has not been confirmed.

HD 91496
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 10h 31m 02.057s[1]
Declination −73° 13′ 17.38″[1]
Apparent magnitude (V) 4.92[2]
Characteristics
Evolutionary stage giant
Spectral type K4/5 III[3]
Variable type suspected[4]
Astrometry
Radial velocity (Rv)13.14[1] km/s
Proper motion (μ) RA: -7.00[1] mas/yr
Dec.: 7.66[1] mas/yr
Parallax (π)3.1223 ± 0.1500 mas[1]
Distance1,040 ± 50 ly
(320 ± 20 pc)
Absolute magnitude (MV)-2.55[5]
Details
Mass6[6] M☉
Radius115[1] R☉
Luminosity2,787[1] L☉
Surface gravity (log g)1.34[7] cgs
Temperature3,915[1] K
Rotational velocity (v sin i)5.7[8] km/s
Other designations
CD−72°614, HD 91496, HIP 51495, HR 4142, SAO 256723[9]
Database references
SIMBADdata

HD 91496 has a faint companion, six magnitudes fainter and 33″ away.[10] It is a distant background star.[11]


References


  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H.
  3. Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H.
  4. Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.
  5. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  6. Kervella, Pierre; Arenou, Frédéric; Mignard, François; Thévenin, Frédéric (2019). "Stellar and substellar companions of nearby stars from Gaia DR2. Binarity from proper motion anomaly". Astronomy and Astrophysics. 623: A72. arXiv:1811.08902. Bibcode:2019A&A...623A..72K. doi:10.1051/0004-6361/201834371. S2CID 119491061.
  7. Kunder, Andrea; Kordopatis, Georges; Steinmetz, Matthias; Zwitter, Tomaž; McMillan, Paul J.; Casagrande, Luca; Enke, Harry; Wojno, Jennifer; Valentini, Marica; Chiappini, Cristina; Matijevič, Gal; Siviero, Alessandro; De Laverny, Patrick; Recio-Blanco, Alejandra; Bijaoui, Albert; Wyse, Rosemary F. G.; Binney, James; Grebel, E. K.; Helmi, Amina; Jofre, Paula; Antoja, Teresa; Gilmore, Gerard; Siebert, Arnaud; Famaey, Benoit; Bienaymé, Olivier; Gibson, Brad K.; Freeman, Kenneth C.; Navarro, Julio F.; Munari, Ulisse; et al. (2017). "The Radial Velocity Experiment (RAVE): Fifth Data Release". The Astronomical Journal. 153 (2): 75. arXiv:1609.03210. Bibcode:2017AJ....153...75K. doi:10.3847/1538-3881/153/2/75. S2CID 118835808.
  8. De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. S2CID 54046583.
  9. "HR 4142". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 31 August 2012.
  10. Sinachopoulos, D.; Gavras, P.; Dionatos, O.; Ducourant, Ch.; Medupe, Th. (2007). "CCD astrometry and components instrumental magnitude difference of 432 Hipparcos wide visual double stars". Astronomy and Astrophysics. 472 (3): 1055. Bibcode:2007A&A...472.1055S. doi:10.1051/0004-6361:20066290.
  11. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.


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