HD 35759

HD 35759 is a star with an orbiting exoplanet located in the circumpolar constellation Camelopardalis. With an apparent magnitude of 7.74, it's impossible to see with the unaided eye, but can be seen with binoculars. The distance to this system is 232 light years based on parallax measurements,^[2] and it is drifting closer with a heliocentric radial velocity of −12.6 km/s.^[5]

HD 35759

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Camelopardalis[1]
Right ascension	05h 31m 33.349s[2]
Declination	+64° 19′ 07.59″[2]
Apparent magnitude (V)	7.74±0.01[3]
Characteristics
Evolutionary stage	subgiant[2]
Spectral type	G0[4]
B−V color index	0.602±0.015[1]
Astrometry
Radial velocity (Rv)	−12.620±0.0025[5] km/s
Proper motion (μ)	RA: −29.318 mas/yr[2] Dec.: −92.726 mas/yr[2]
Parallax (π)	14.0772±0.0217 mas[2]
Distance	231.7 ± 0.4 ly (71.0 ± 0.1 pc)
Absolute magnitude (MV)	3.45[1]
Details
Mass	1.15±0.08[6] M☉
Radius	1.76+0.06 −0.04[5] R☉
Luminosity	3.445+0.015 −-0.014[5] L☉
Surface gravity (log g)	4.0159+0.0740 −0.0818[7] cgs
Temperature	5,927+67 −93[5] K
Metallicity [Fe/H]	0.04±0.02[8] dex
Rotational velocity (v sin i)	3[9] km/s
Age	4.2[10] Gyr
Other designations
BD+64 532, HD 35759, HIP 25883, SAO 13524, WDS J05316+6419A[11]
Database references
SIMBAD	data
Exoplanet Archive	data

This is a G-type star with 15% more mass than the Sun, but has 1.76 times the radius. It radiates at about 3 solar luminosities, and has an effective temperature of 5,927 K, which gives it a yellow hue. HD 35759 is slightly enriched in metals, with having 9.6% more iron abundance than the Sun. Like many older G-type stars, HD 35759 rotates rather slowly, with a projected rotational velocity of 3 km/s.

Planetary System

In 2016, a super-jovian exoplanet was discovered orbiting the star on an eccentric orbit. Since the planet was discovered using doppler spectroscopy, its radius and true mass is unknown.

The HD 35759 planetary system^[8]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥ 3.76±0.17 MJ	0.389±0.09	82.467±0.019	0.389±0.006	—	—