Epsilon Cancri

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ε Cancri
Cancer constellation map.svg
Red circle.svg

Location of ε Cancri (circled red)
Observation data
Epoch J2000      Equinox J2000
Constellation Cancer
Right ascension 08h 40m 27.01052s[1]
Declination 19° 32′ 41.3133″[1]
Apparent magnitude (V) 6.29[2]
Characteristics
Spectral type A5III[3]
U−B color index +0.16[4]
B−V color index +0.17[4]
Astrometry
Radial velocity (Rv) +29.90[5] km/s
Proper motion (μ) RA: -35.60[1] mas/yr
Dec.: -12.98[1] mas/yr
Parallax (π) 5.56 ± 0.56[1] mas
Distance approx. 590 ly
(approx. 180 pc)
Absolute magnitude (MV) 0.00[2]
Details
Luminosity 83.50[2] L
Temperature 7,851[6] K
Metallicity [Fe/H] -0.01[7] dex
Rotational velocity (v sin i) 82[8] km/s
Other designations
Praesepe, Prezepe, 41 Cancri, BD+20°2171, CCDM J08404+1932A, GC 11904, GSC 01395-02733, HIP 42556, HR 3429, HD 73731, SAO 98024, WDS J08405+1933A
Database references
SIMBAD data

Epsilon Cancri (ε Cnc, ε Cancri) is a star in the constellation Cancer. ε Cancri is one of the brighter members of the Beehive Cluster, and the Bayer designation ε Cancri originally referred to the entire cluster.

ε Cancri is a class A5III[3] white A-type giant with an apparent magnitude of +6.29.[2] It is approximately 590 light years away from Earth based on parallax.[1]

It is a spectroscopic binary, with an orbit of 35 days and eccentricity of 0.32.[9]

References[edit]

  1. ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971Freely accessible. doi:10.1134/S1063773712050015.  Vizier catalog entry
  3. ^ a b Abt, Helmut A.; Morrell, Nidia I. (1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". Astrophysical Journal Supplement v.99. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182. 
  4. ^ a b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42: 443. Bibcode:2014JAVSO..42..443M. Vizier catalog entry
  5. ^ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727. Bibcode:2004A&A...424..727P. arXiv:astro-ph/0406573Freely accessible. doi:10.1051/0004-6361:20041213. 
  6. ^ 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
  7. ^ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771. Bibcode:2012AstL...38..771G. arXiv:1606.08814Freely accessible. doi:10.1134/S1063773712120031.  Vizier catalog entry
  8. ^ 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. 
  9. ^ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727. Bibcode:2004A&A...424..727P. arXiv:astro-ph/0406573Freely accessible. doi:10.1051/0004-6361:20041213.