HD 40657

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HD 40657
Orion constellation map.svg
Red circle.svg

Location of HD 40657 (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Orion
Right ascension 06h 00m 03.34974s[1]
Declination −3° 04′ 27.3196″[1]
Apparent magnitude (V) 4.52[2]
Spectral type K1.5IIIFe-1.5[3]
U−B color index +1.21[2]
B−V color index +1.22[2]
Radial velocity (Rv) +25.90[4] km/s
Proper motion (μ) RA: +7.21[1] mas/yr
Dec.: -73.42[1] mas/yr
Parallax (π) 7.75 ± 0.81[1] mas
Distance approx. 420 ly
(approx. 130 pc)
Absolute magnitude (MV) -1.00[5]
Luminosity 376[5] L
Surface gravity (log g) 2.42[6] cgs
Temperature 4,566[7] K
Metallicity [Fe/H] -0.48[5] dex
Rotational velocity (v sin i) 2.1[8] km/s
Other designations
BD-03°1256, FK5 2457, GC 7587, HIP 28413, HR 2113, HD 40657, NSV 2770, SAO 132732
Database references

HD 40657 is a class K1.5III[3] (orange giant) star in the constellation Orion. Its apparent magnitude is 4.52[2] and it is approximately 420 light years away based on parallax.[1]


  1. ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D. 
  3. ^ a b 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. ^ Wilson, R. E. (1953). General Catalogue of Stellar Radial Velocities. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. LCCN 54001336. 
  5. ^ a b c Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971Freely accessible. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.  Vizier catalog entry
  6. ^ Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. arXiv:1605.07384Freely accessible. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497. 
  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. 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:1312.3474Freely accessible. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762.  Vizier catalog entry