HD 114783
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| 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 |
| Distance | 68.59 ± 0.04 ly (21.03 ± 0.01 pc) |
| Absolute magnitude (MV) | 6.00 |
| Details | |
| Mass | 0.883+0.018 −0.028 M☉ |
| Radius | 0.810+0.011 −0.009 R☉ |
| Luminosity | 0.423±0.001 L☉ |
| Surface gravity (log g) | 4.42±0.58 cgs |
| Temperature | 5,114±12 K |
| Metallicity [Fe/H] | 0.08±0.11 dex |
| Rotational velocity (v sin i) | 1.9±0.5 km/s |
| Age | 2.5+3.0 −1.6 Gyr |
| Other designations | |
| BD−01°2784, GJ 3769, HD 114783, HIP 64457, SAO 139218 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| ARICNS | data |
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.
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 by the first time, via astrometry. The masses and orbits were revised in 2025.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination (°) |
Radius |
|---|---|---|---|---|---|---|
| b | ≥ 1.043±0.038 MJ | 1.180+0.019 −0.021 |
1.34858(82) | 0.121+0.013 −0.014 |
— | — |
| c | 1.47+0.58 −0.63 MJ |
5.03±0.12 | 11.89+0.30 −0.27 |
0.074+0.047 −0.045 |
21+7 −4 or 152+8 −27 |
— |
See also
References
- 1 2 3 4 5 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
- 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- 1 2 Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode:1999MSS...C05....0H.
- 1 2 3 Vogt, Steven S.; et al. (2002). "Ten Low-Mass Companions from the Keck Precision Velocity Survey". The Astrophysical Journal. 568 (1): 352–362. arXiv:astro-ph/0110378. Bibcode:2002ApJ...568..352V. doi:10.1086/338768. S2CID 2272917.
- 1 2 3 4 5 Soto, M. G.; Jenkins, J. S. (2018). "Spectroscopic Parameters and atmosphEric ChemIstriEs of Stars (SPECIES). I. Code description and dwarf stars catalogue". Astronomy and Astrophysics. 615: A76. arXiv:1801.09698. Bibcode:2018A&A...615A..76S. doi:10.1051/0004-6361/201731533. S2CID 119107228.
- 1 2 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ↑ Bryan, Marta L.; et al. (2016). "Statistics of Long Period Gas Giant Planets in Known Planetary Systems". The Astrophysical Journal. 821 (2): 89. arXiv:1601.07595. Bibcode:2016ApJ...821...89B. doi:10.3847/0004-637X/821/2/89. S2CID 19709252.
- 1 2 Philipot, F.; Lagrange, A.-M.; et al. (August 2023). "Multi techniques approach to identify and/or constrain radial velocity sub-stellar companions". Astronomy & Astrophysics. 678: A107. arXiv:2308.05417. doi:10.1051/0004-6361/202346612. S2CID 260775968.
- 1 2 An, Qier; Brandt, Timothy D.; Brandt, G. Mirek; Venner, Alexander (2025-08-11). "Orbits and Masses for 156 Companions from Combined Astrometry and Radial Velocities, and A Validation of Gaia Non-Single Star Solutions". The Astrophysical Journal Supplement Series. arXiv:2508.08374.
