HD 125612

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 125612
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Virgo
Right ascension 14h 20m 53.517s[1]
Declination –17° 28′ 53.49″[1]
Apparent magnitude (V) 8.31[2] / ?
Characteristics
Spectral type G3V[2] / M3- 4V[3]
Apparent magnitude (B) 8.92
Apparent magnitude (J) 7.179
Apparent magnitude (H) 6.950
Apparent magnitude (K) 6.838
B−V color index 0.59
Variable type none
Astrometry
Radial velocity (Rv) −18.4 km/s
Proper motion (μ) RA: -61.12 ± 1.25[1] mas/yr
Dec.: -67.65 ± 0.79[1] mas/yr
Parallax (π) 18.45 ± 1.09 mas
Distance 180 ± 10 ly
(54 ± 3 pc)
Absolute magnitude (MV) 4.72
Position (relative to HD 125612 A)[3]
Component HD 125612 B
Angular distance 89.994 ± 0.066
Position angle 162.682 ± 0.052°
Observed separation
(projected)
~4750 AU
Details
Mass 1.091 ± 0.027[2] M
Radius 1.05 ± 0.08[2] R
Luminosity 1.09[2] L
Surface gravity (log g) 4.41 ± 0.05[2] cgs
Temperature 5900 ± 18[2] K
Metallicity [Fe/H] = 0.23 ± 0.014[2]
Age <3[2] Gyr
HD 125612 B
Mass 0.184 ± 0.012[3] M
Age 1-5[3] Gyr
Other designations
BD-16˚ 3844, HIP 70123, GSC 06143-01696, SAO 158501
Database references
SIMBAD data
Exoplanet Archive data
Extrasolar Planets
Encyclopaedia
data

HD 125612 is a yellow main sequence star located approximately 180 light years away in the constellation Virgo. It is rich in heavy elements and has three known planets in orbit around it.[2][4] A red dwarf companion star was detected in 2009 at a projected separation of 4750 AU. The possibility of a much closer companion to the primary star was also suggested, though this will need more observation to better define.[3]

The HD 125612 planetary system[2]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
c ≥18.4 M 0.05 4.1547 ± 0.0005 0.27 ± 0.12
b ≥3.0 MJ 1.37 559.4 ± 1.3 0.46 ± 0.01
d ≥7.2 MJ 4.2 3008 ± 202 0.28 ± 0.12

See also[edit]

References[edit]

Coordinates: Sky map 14h 20m 53.5147s, −17° 28′ 53.475″