Eta Cancri

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Eta Cancri
Observation data
Epoch J2000      Equinox J2000
Constellation Cancer
Right ascension 08h 32m 42.49600s [1]
Declination 20° 26′ 28.1865″ [1]
Apparent magnitude (V) 5.34 [2]
Characteristics
Spectral type K3III [2]
B−V color index +1.26 [2]
Astrometry
Radial velocity (Rv) +22.46[3] km/s
Proper motion (μ) RA: -46.33[1] mas/yr
Dec.: -44.31[1] mas/yr
Parallax (π) 10.93 ± 0.40[1] mas
Distance 300 ± 10 ly
(91 ± 3 pc)
Absolute magnitude (MV) 0.54 [4]
Other designations
33 Cancri, HR 3366, HD 72292, BD+20°2109, FK5 321, HIP 41909, SAO 80243, GC 11687 [2]
Database references
SIMBAD data

Eta Cancri (η Cnc, η Cancri) is a class K3III[2] (orange giant) star in the constellation Cancer. Its apparent magnitude is 5.34[2] and it is approximately 298 light years away based on parallax.[1]

References[edit]

  1. ^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752free to read. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d e f "Eta Cancri". SIMBAD Astronomical Database. Retrieved 2015-10-07. 
  3. ^ 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/0409579free to read, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272 
  4. ^ Absolute magnitude calculated as , where is the star's absolute magnitude, is the star's apparent magnitude, and is the star's measured parallax in arcseconds.