82 Cancri

82 Cancri
Location of 82 Cancri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cancer
Right ascension 09h 15m 13.85243s[1]
Declination +14° 56′ 29.4331″[1]
Apparent magnitude (V) +5.33[2]
Characteristics
Spectral type K1 III[3]
U−B color index +1.31[2]
B−V color index +1.32[2]
Astrometry
Radial velocity (Rv)+27.49±0.19[4] km/s
Proper motion (μ) RA: −40.32[1] mas/yr
Dec.: −11.27[1] mas/yr
Parallax (π)5.37 ± 0.34[1] mas
Distance610 ± 40 ly
(190 ± 10 pc)
Absolute magnitude (MV)−0.98[5]
Details
Luminosity444[6] L☉
Temperature4,202[6] K
Metallicity [Fe/H]−0.195±0.099[7] dex
Other designations
π2 Cnc, 82 Cancri, BD+15° 2009, FK5 2733, HD 79554, HIP 45410, HR 3669, SAO 98456[8]
Database references
SIMBADdata

82 Cancri (Pi2 Cancri, π2 Cancri) is a solitary,[3] orange-hued star in the zodiac constellation of Cancer. This is an evolved K-type giant star with a stellar classification of K1 III.[3] With an apparent visual magnitude of +5.33,[2] it is visible to the naked eye on a dark night. Based upon an annual parallax shift of 5.37 mas as seen from Earth,[1] this star is located roughly 610 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction of 0.10 magnitudes due to interstellar dust.[9]

References

  1. 1 2 3 4 5 6 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. 1 2 3 4 Rybka, E. (1969), "The corrected magnitudes and colours of 278 stars near S.A. 1-139 in the UBV system", Acta Astronomica, 19: 229, Bibcode:1969AcA....19..229R.
  3. 1 2 3 Eggleton, P. P.; Tokovinin, A. A. (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.
  4. ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
  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.
  6. 1 2 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
  7. ↑ Taylor, B. J. (February 1999), "Catalogs of temperatures and [Fe/H] averages for evolved G and K stars", Astronomy and Astrophysics Supplement, 134: 523–524, Bibcode:1999A&AS..134..523T, doi:10.1051/aas:1999153.
  8. ↑ "pi.02 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-14.
  9. ↑ Famaey, B.; et al. (January 2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430 (1): 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272.
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