Eta Cancri

Eta Cancri

Observation data Epoch J2000      Equinox J2000
Constellation	Cancer
Right ascension	08^h 32^m 42.49600^s [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

1. 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. Vizier catalog entry
2. "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/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272
4. Absolute magnitude calculated as $M = m + 5 (1 + \log_{10}{p})\!\,$, where $M$ is the star's absolute magnitude, $m$ is the star's apparent magnitude, and $p$ is the star's measured parallax in arcseconds.