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78 Cancri

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Star in the constellation Cancer

78 Cancri
Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Cancer
Right ascension	09 09 02.31165
Declination	+17° 28′ 10.7518″
Apparent magnitude (V)	7.19
Characteristics
Spectral type	K3 III
B−V color index	1.207±0.008
Astrometry

Radial velocity (R_v)	+77.70±0.15 km/s
Proper motion (μ)	RA: −38.419 mas/yr Dec.: −32.292 mas/yr
Parallax (π)	5.9540 ± 0.0572 mas
Distance	548 ± 5 ly (168 ± 2 pc)
Absolute magnitude (M_V)	0.56

Details

Mass	1.62 `M`_☉
Radius	10.92+0.50 −0.94 `R`_☉
Luminosity	47.6±0.6 `L`_☉
Temperature	4,587+213 −101 K
Age	2.91 Gyr

Other designations
78 Cnc, BD+28°1683, HD 77557, HIP 44512, HR 3601, SAO 80609
Database references
SIMBAD	data

78 Cancri is a star in the zodiac constellation of Cancer, located 548 light years from the Sun. It is too faint to be viewed with the naked eye, having an apparent visual magnitude of 7.19. The star is moving away from the Earth with a relatively large radial velocity of +77.7 km/s. It is an evolved giant star with a stellar classification of K3 III.

References

^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ 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, S2CID 119257644.
^ Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114.
"78 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-11.

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Constellation of Cancer

Bayer	α (Acubens) β (Tarf) γ (Asellus Borealis) δ (Asellus Australis) ε (Meleph) ζ (Tegmine) ζ η θ ι κ λ (Piautos) μ μ ν ξ (Nahn) ο ο π π ρ (Copernicus) ρ σ σ σ τ υ υ φ φ χ ψ ψ ω ω
Flamsteed	1 3 5 7 8 11 12 15 20 (d) 21 24 25 (d) 27 28 (CX) 29 34 35 36 (c) 37 38 39 40 42 44 45 (A) 46 49 (b) 50 (A) 53 54 57 60 61 66 67 68 70 71 75 78 79 80 83
Variable	R X RS VZ AZ DX EI HL HM
HD	72945 72946 73534 (Gakyid) 79498
Other	GJ 3470 (Kaewkosin) HIP 41378 K2-187 LHS 2090 Pr0211 WD J0914+1914 YBP 1194

Exoplanets	55 Cancri b c d e f β Cancri b GJ 3470 b HD 73534 b HIP 41378 b c d e f Pr0201 b

Star clusters	Beehive Cluster Messier 67

Nebulae	Abell 30 Abell 31

NGC	2503 2535 2536 2608 2623 2648 2775 2801 2803 2804 2812
Other	3C 191 3C 212 3C 215 DLA0817g IC 2431 OJ 287 QSO B0839+187 UGC 4457 4C +29.30 SDSS J0849+1114

Galaxy clusters	Abell 671 Musket Ball Cluster

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