HD 158259
HD 158259 is a main sequence (G0) star located approximately 88 light years away in the constellation Draco, discovered by the SOPHIE échelle spectrograph using the radial velocity method.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Draco |
| Right ascension | 17h 25m 24.05s[1] |
| Declination | 52° 47′ 26.16″[1] |
| Apparent magnitude (V) | 6.46[1] |
| Characteristics | |
| HD 158259 | |
| Evolutionary stage | Main sequence |
| Spectral type | G0[1] |
| Astrometry | |
| Radial velocity (Rv) | 13.495±0.0007[2] km/s |
| Proper motion (μ) | RA: −91.047±0.055[1] mas/yr Dec.: −49.639±0.059[1] mas/yr |
| Parallax (π) | 36.93 ± 0.029 mas[1] |
| Distance | 88.32 ± 0.07 ly (27.08 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.27[3] |
| Details[1] | |
| HD 158259 | |
| Mass | 1.08±0.1 M☉ |
| Radius | 1.21+0.03 −0.08 R☉ |
| Other designations | |
HIP 85268, 2MASS J17252406+5247263, TYC 3888-1886-1, TOI-1462, GSC 03888-01886, Gaia DR2 1416050859226670848[2] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Characteristics
HD 158259 is a G0 star with a rotation period of 18±5 days.[1]
Planets
Five planets have been confirmed orbiting HD 158259, along with one unconfirmed planet. The planets orbit in a nearly 3:2 orbital resonance, with the period ratios 1.5758, 1.5146, 1.5296, 1.5130, and 1.4480, respectively, starting from the innermost pairing.[4] A dynamical analysis has shown that the system is stable.[1] One of the planets, HD 158259 b, is a super-Earth; the rest, including the unconfirmed HD 158259 g, are mini-Neptunes.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 2.2 M🜨 | 0.034 | 2.177±0.44 | <0.1 | — | — |
| c | 5.6 M🜨 | 0.046 | 3.432±0.00002 | <0.1 | — | — |
| d | 5.4 M🜨 | 0.060 | 5.198±0.008 | <0.1 | — | — |
| e | 6.1 M🜨 | 0.080 | 7.954±0.0016 | <0.1 | — | — |
| f | 6.1 M🜨 | 0.105 | 12.03±0.0028 | <0.1 | — | — |
| g (unconfirmed) | 6.9 M🜨 | 0.135 | 17.39±0.023 | <0.1 | — | — |
References
- Hara, N. C.; Bouchy, F.; Stalport, M.; Boisse, I.; Rodrigues, J.; Delisle, J. B.; Santerne, A.; Henry, G. W.; Arnold, L.; Astudillo-Defru, N.; Borgniet, S.; Bonfils, X.; Bourrier, V.; Brugger, B.; Courcol, B.; Dalal, S.; Deleuil, M.; Delfosse, X.; Demangeon, O.; Díaz, R. F.; Dumusque, X.; Forveille, T.; Hébrard, G.; Hobson, M. J.; Kiefer, F.; Lopez, T.; Mignon, L.; Mousis, O.; Moutou, C.; Pepe, F.; Rey, J.; Santos, N. C.; Ségransan, D.; Udry, S.; Wilson, P. A. (March 10, 2020). "The SOPHIE search for northern extrasolar planets XVI. HD 158259: A compact planetary system in a near-3:2 mean motion resonance chain". Astronomy & Astrophysics. 636 (1): L6. arXiv:1911.13296. Bibcode:2020A&A...636L...6H. doi:10.1051/0004-6361/201937254. S2CID 208512859.
- "HD 158259". SIMBAD. Retrieved February 19, 2022.
- "HIP 85268 - Facts about the Star". Universe Guide. Retrieved February 19, 2022.
- Papaloizou, J. C. B. (June 12, 2021). "The orbital evolution of resonant chains of exoplanets incorporating circularisation produced by tidal interaction with the central star with application to the HD 158259 and EPIC 245950175 systems". Celestial Mechanics and Dynamical Astronomy. 133 (6): 30. arXiv:2105.03652. Bibcode:2021CeMDA.133...30P. doi:10.1007/s10569-021-10027-7. S2CID 234340375.
- Hardegree-Ullman, K. K.; Christiansen, J. L.; Ciardi, D. R.; Crossfield, I. J. M.; Dressing, C. D.; Livingston, J. H.; Volk, K.; Agol, E.; Barclay, T.; Barentsen, G.; Benneke, B.; Gorjian, V.; Kristiansen, M. H. (2021). "K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System". The Astronomical Journal. 161 (5): 219. arXiv:2102.08978. Bibcode:2021AJ....161..219H. doi:10.3847/1538-3881/abeab0. S2CID 231951815.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.