Summary
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]
| 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] |
| Distance | 68.59 ± 0.04 ly (21.03 ± 0.01 pc) |
| Absolute magnitude (MV) | 6.00[2] |
| Details[5] | |
| Mass | 0.883+0.018 −0.028 M☉ |
| Radius | 0.810+0.011 −0.009 R☉ |
| Luminosity | 0.423±0.001[6] 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 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| ARICNS | data |
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]
| 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 edit
References edit
- ^ a b c d e f 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.
- ^ a b c d 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.
- ^ a b Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode:1999MSS...C05....0H.
- ^ a b c 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.
- ^ a b c d e 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.
- ^ a b 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.
- ^ a b 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.
- ^ 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.