HD 42540

HD 42540, also known as HR 2196, is a suspected variable star in the constellation Pictor.[5] A class K2-3III[3] orange giant, its apparent magnitude is 5.04[2] and it is approximately 362 light years away based on parallax.[1]

HD 42540
Location of HD 42540 (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Pictor
Right ascension 06h 07m 03.38998s[1]
Declination −62° 09′ 16.4914″[1]
Apparent magnitude (V) 5.04[2]
Characteristics
Spectral type K2-3III[3]
U−B color index +1.35[4]
B−V color index +1.25[4]
Variable type suspected[5]
Astrometry
Radial velocity (Rv)+21.60[6] km/s
Proper motion (μ) RA: +21.72[1] mas/yr
Dec.: -69.82[1] mas/yr
Parallax (π)9.02 ± 0.16[1] mas
Distance362 ± 6 ly
(111 ± 2 pc)
Absolute magnitude (MV)-0.18[2]
Details
Luminosity189[2] L☉
Temperature4,530[7] K
Rotational velocity (v sin i)1.7[8] km/s
Other designations
CD-62°235, FK5 2469, GC 7825, HIP 28991, HR 2196, HD 42540, NSV 2845, SAO 249451
Database references
SIMBADdata

References
  1. Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. 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. Vizier catalog entry
  3. Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
  4. Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally Published in: Institut d'Astronomie. 2168. Bibcode:2006yCat.2168....0M.Vizier catalog entry
  5. Watson, Christopher (18 January 2010). "NSV 2845". AAVSO Website. American Association of Variable Star Observers. Retrieved 24 May 2014.
  6. Wilson, R. E. (1953). General Catalogue of Stellar Radial Velocities. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. LCCN 54001336.
  7. McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427: 343. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. Vizier catalog entry
  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". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. Vizier catalog entry


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