User:Kepler-1229b/gtfh
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 04h 06m 34.8414s[1] |
| Declination | −20° 51′ 11.2259″[1] |
| Apparent magnitude (V) | 9.675 |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | M0V[2] or K7[3] |
| B−V color index | 1.206[4] |
| Astrometry | |
| Radial velocity (Rv) | 25.068±0.111[5] km/s |
| Proper motion (μ) | RA: 52.803[6] mas/yr Dec.: -778.887[6] mas/yr |
| Parallax (π) | 38.6445±0.0173 mas[6] |
| Distance | 84.40 ± 0.04 ly (25.88 ± 0.01 pc) |
| Details | |
| Mass | 0.69[2] M☉ |
| Radius | 0.659±0.047[7] R☉ |
| Luminosity | 0.1372±0.0022[3] L☉ |
| Surface gravity (log g) | 4.68±0.04[7] cgs |
| Temperature | 4298±200[7] K |
| Metallicity [Fe/H] | -0.26±0.08[8] dex |
| Age | 1.1-10[7][9] Gyr |
| Other designations | |
| Gaia DR2 5091077112523802112, GJ 160.2, HIP 19165, LHS 1628, TYC 5889-644-1, 2MASS J04063483-2051103[1] | |
| Database references | |
| SIMBAD | data |
BD-21 784, also known as Gliese 160.2, Gliese 9144, LHS 1628 or HIP 19165 is a K-type main-sequence star located 84.4 light-years away in the constellation of Eridanus. Its surface temperature is 4300 K.[3] The star's concentration of heavy elements is low, with concentration of iron just 55% of the Sun`s.[8] The age of BD-21 784 is poorly constrained to range from 1.1 to 10 billion years,[7] but may be similar to that of the Sun.[9]
Planetary system
[edit]In 2014 one planet, named Gliese 160.2 b, was announced on a 5.2-day orbit, discovered by the radial velocity method.[10] The planetary equilibrium temperature is 736±43 K.[3] The existence of the planet was refuted with the expanded radial-velocity dataset in 2020 though.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| Gliese 160.2 b (refuted) | > 10.2+7.2 −4.1 M🜨 |
0.053+0.004 −0.007 |
5.2354+0.0027 −0.0065 |
— | — | >3.10 R🜨 |
References
[edit]- ^ a b c "BD-21 784". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-04-27.
- ^ a b c Feng, Fabo; Butler, R. Paul; Shectman, Stephen A.; Crane, Jeffrey D.; Vogt, Steve; Chambers, John; Jones, Hugh R. A.; Wang, Sharon Xuesong; Teske, Johanna K.; Burt, Jenn; Díaz, Matías R.; Thompson, Ian B. (2020). "Search for Nearby Earth Analogs. II. Detection of Five New Planets, Eight Planet Candidates, and Confirmation of Three Planets around Nine Nearby M Dwarfs". The Astrophysical Journal Supplement Series. 246 (1): 11. arXiv:2001.02577. Bibcode:2020ApJS..246...11F. doi:10.3847/1538-4365/ab5e7c. S2CID 210064560.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ a b c d e Martínez-Rodríguez, Héctor; Caballero, José Antonio; Cifuentes, Carlos; Piro, Anthony L.; Barnes, Rory (2019). "Exomoons in the Habitable Zones of M Dwarfs". The Astrophysical Journal. 887 (2): 261. arXiv:1910.12054. Bibcode:2019ApJ...887..261M. doi:10.3847/1538-4357/ab5640. S2CID 204904780.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ Chromospheric Ca II emission in Nearby F, G, K, and M stars, 2004, arXiv:astro-ph/0402582
- ^ PRECISE RADIAL VELOCITIES OF 2046 NEARBY FGKM STARS AND 131 STANDARDS, 2012, arXiv:1207.6212
- ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d e PRECISION STELLAR CHARACTERIZATION OF FGKM STARS USING AN EMPIRICAL SPECTRAL LIBRARY, 2017, arXiv:1701.00922
- ^ a b SWEET-Cat updated New homogenous spectroscopic parameters, 2018, arXiv:1810.08108
- ^ a b HAZMAT II: Ultraviolet Variability of Low-Mass Stars in the GALEX Archive, 2017, arXiv:1705.05583
- ^ Tuomi, Mikko; Jones, Hugh R. A.; Barnes, John R.; Anglada-Escudé, Guillem; Jenkins, James S. (2014). "Bayesian search for low-mass planets around nearby M dwarfs – estimates for occurrence rate based on global detectability statistics". Monthly Notices of the Royal Astronomical Society. 441 (2): 1545–1569. arXiv:1403.0430. doi:10.1093/mnras/stu358.
{{cite journal}}: CS1 maint: unflagged free DOI (link)
Category:Eridanus (constellation)
Category:K-type main-sequence stars
Category:Hypothetical planetary systems
04063483-2051103
019165
9144
BD-21 784
 | This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |