HD 114783

HD 114783 is a star with two exoplanetary companions in the equatorial constellation of Virgo. With an apparent visual magnitude of 7.56 it is too faint to be visible with the unaided eye, but is an easy target for binoculars. Based on parallax measurements, it is located at a distance of 68.6 light-years (21.0 parsecs) from the Sun, but is drifting closer with a radial velocity of −12 km/s.

HD 114783
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension 13h 12m 43.78556s
Declination –02° 15 54.1307
Apparent magnitude (V) 7.56
Characteristics
Spectral type K1V
B−V color index 0.930±0.013
Variable type Constant
Astrometry
Radial velocity (Rv)−12.07±0.12 km/s
Proper motion (μ) RA: −138.362(34) mas/yr
Dec.: 10.284(22) mas/yr
Parallax (π)47.5529 ± 0.0291 mas
Distance68.59 ± 0.04 ly
(21.03 ± 0.01 pc)
Absolute magnitude (MV)6.00
Details
Mass0.883+0.018
−0.028
 M
Radius0.810+0.011
−0.009
 R
Luminosity0.423±0.001 L
Surface gravity (log g)4.42±0.58 cgs
Temperature5,114±12 K
Metallicity [Fe/H]0.08±0.11 dex
Rotational velocity (v sin i)1.9±0.5 km/s
Age2.5+3.0
−1.6
 Gyr
Other designations
BD−01°2784, GJ 3769, HD 114783, HIP 64457, SAO 139218
Database references
SIMBADdata
Exoplanet Archivedata
ARICNSdata

This is an orange-hued K-type main-sequence star with a stellar classification of K1V. It is roughly 2.5 billion years old and is chromospherically inactive with a low projected rotational velocity of 1.9 km/s. The star has 88% of the mass and 81% of the radius of the Sun. It is radiating 42% of the luminosity of the Sun from its photosphere at an effective temperature of 5,114 K.

In 2001, the California and Carnegie Planet Search team found an exoplanet, HD 114783 b, orbiting the star using the radial velocity method. The discovery was made with the Keck Telescope. A second companion, HD 114783 c, was discovered in 2016, and in 2023 its inclination and true mass were measured via astrometry.

The HD 114783 planetary system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b  1.034±0.089 MJ 1.169±0.068 496.9±2.3 0.085±0.033
c 1.9+0.5
−0.4
 MJ
5.0±0.1 4,352+88
−76
0.05+0.04
−0.03
21+7
−4
or 159+4
−6
°
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