HD 60532

HD 60532 is a star with two orbiting exoplanets in the southern constellation of Puppis. The designation HD 60532 takes its name from the Henry Draper Catalogue. The system is located at a distance of 85.5 light years from the Sun, and is drifting further away with a radial velocity of 61 km/s.^[5] At that distance, the star has an apparent visual magnitude of 4.45,^[2] which is bright enough to be faintly visible to the naked eye. The motion of this system through space brought it within 10.3 light-years of the Sun some 408,600 years ago.^[11]

HD 60532

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Puppis
Right ascension	07h 34m 03.181s[1]
Declination	−22° 17′ 45.84″[1]
Apparent magnitude (V)	4.450[2]
Characteristics
Spectral type	F6 IV-V[3]
U−B color index	+0.07[4]
B−V color index	+0.51[4]
Astrometry
Radial velocity (Rv)	+61.042±0.0004[5] km/s
Proper motion (μ)	RA: −40.180 mas/yr[1] Dec.: +46.791 mas/yr[1]
Parallax (π)	38.1379±0.1087 mas[1]
Distance	85.5 ± 0.2 ly (26.22 ± 0.07 pc)
Absolute magnitude (MV)	2.40[2]
Details
Mass	1.44+0.03 −0.1[6] M☉
Radius	2.66±0.03[7] R☉
Luminosity	9.3±0.1[7] L☉
Surface gravity (log g)	3.75±0.02[7] cgs
Temperature	6,095[6] K
Metallicity [Fe/H]	−0.42[6] dex
Rotational velocity (v sin i)	8[6] km/s
Age	2.7±0.1[6] Gyr
Other designations
108 G. Puppis, BD−21°2007, GC 10134, GJ 279, HIP 36795, HR 2906, SAO 174009, 2MASS J07340317-2217457[8][9][10]
Database references
SIMBAD	data
Exoplanet Archive	data
ARICNS	data

The spectrum of this star shows blended features of an F-type main-sequence star and an evolving subgiant star, with a corresponding stellar classification of F6 IV-V.^[3] It is an estimated 2.7 billion years old with a projected rotational velocity of 8 km/s and a low level of magnetic activity in its chromosphere.^[6] The star has 1.44^[6] times the mass of the Sun and 2.66 times the Sun's radius.^[7] The abundance of iron, a measure of the star's metallicity, is a scant 38% of solar.^[6] HD 60532 is radiating 9.3^[7] times the luminosity of the Sun from its photosphere at an effective temperature of 6,095 K.^[6]

Planetary system

In September 2008, two Jupiter-like planets were found orbiting the star.^[6] The orbital periods of these two planets appear to be in 3:1 resonance.^[12]

The HD 60532 planetary system^[13]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥1.06±0.08 MJ	0.77±0.02	201.9±0.3	0.26±0.02	—	—
c	≥2.51±0.16 MJ	1.60±0.04	600.1±2.4	0.03±0.02	—	—

See also

• HD 69830
• List of extrasolar planets