HD 114783
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension 13h 12m 43.78556s[1]
Declination –02° 15′ 54.1307″[1]
Apparent magnitude (V) 7.56[2]
Characteristics
Spectral type K1V[3]
B−V color index 0.930±0.013[2]
Variable type Constant[4]
Astrometry
Radial velocity (Rv)−12.07±0.12[1] km/s
Proper motion (μ) RA: −138.362(34) mas/yr[1]
Dec.: 10.284(22) mas/yr[1]
Parallax (π)47.5529 ± 0.0291 mas[1]
Distance68.59 ± 0.04 ly
(21.03 ± 0.01 pc)
Absolute magnitude (MV)6.00[2]
Details[5]
Mass0.883+0.018
−0.028 M☉
Radius0.810+0.011
−0.009 R☉
Luminosity0.423±0.001[6] 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

HD 114783 is a star with two exoplanetary companions in the equatorial constellation of Virgo. With an apparent visual magnitude of 7.56[2] 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.[1]

This is an orange-hued K-type main-sequence star with a stellar classification of K1V.[3] It is roughly 2.5[5] billion years old and is chromospherically inactive[4] with a low projected rotational velocity of 1.9 km/s.[5] The star has 88% of the mass and 81% of the radius of the Sun.[5] It is radiating 42%[6] of the luminosity of the Sun from its photosphere at an effective temperature of 5,114 K.[5]

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.[4] A second companion, HD 114783 c, was discovered in 2016,[7] and in 2023 its inclination and true mass were measured via astrometry.[8]

The HD 114783 planetary system[9][8]
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°		 —

See also

References

  1. 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.
  2. 1 2 3 4 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.
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. ↑ 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.
  8. 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. arXiv:2308.05417. doi:10.1051/0004-6361/202346612. S2CID 260775968.
  9. ↑ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. S2CID 119067572.
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