75 Cancri

75 Cancri

Observation data Epoch J2000      Equinox J2000
Constellation	Cancer
Right ascension	Template:RA
Declination	Template:DEC
Apparent magnitude (V)	5.98
Characteristics
Spectral type	G5 IV-V
U−B Template:Engvar	+0.20
B−V Template:Engvar	+0.65
Astrometry
Radial velocity (Rv)	9.7478(60) km/s
Proper motion (μ)	RA: −138.07 mas/yr Dec.: −369.97 mas/yr
Parallax (π)	32.004±0.052 mas
Distance	Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc)
Orbit
Period (P)	19.412347(23) d
Semi-major axis (a)	5.8696(96) mas
Eccentricity (e)	0.19494(11)
Inclination (i)	19.412347(23)°
Longitude of the node (Ω)	171.892(85)°
Periastron epoch (T)	JD 2453895.9025(24)
Argument of periastron (ω) (secondary)	283.389(39)°
Semi-amplitude (K1) (primary)	26.4961(35) km/s
Semi-amplitude (K2) (secondary)	30.7579(65) km/s
Details
75 Cnc A
Mass	1.173(24) Template:Solar mass
Temperature	6000 K
Metallicity [Fe/H]	−0.09 dex
75 Cnc B
Mass	1.011(21) Template:Solar mass
Temperature	5900 K
Metallicity [Fe/H]	{{{metal_fe2}}} dex
Other designations
Template:Odlist
Database references
SIMBAD	data

75 Cancri (abbreviated to 75 Cnc) is a binary star in the constellation of Cancer. The system is located about 102 light-years (31 parsecs) away, based on its stellar properties.

75 Cancri is a spectroscopic binary, which means the two stellar components are too close to be resolved, but periodic Doppler shifts in their spectra indicate orbital motion. In this case, light from both stars can be detected, and it is a double-lined spectroscopic binary. The orbital period of the system is 19.41 days, and the eccentricity of the system is 0.19494, implying a slightly elliptical orbit. The primary has a mass of Template:Solar mass, and is a G-type main-sequence star or subgiant. The secondary is less massive, at Template:Solar mass.