HAT-P-30, also known as WASP-51, is the primary of a binary star system about 700 light-years away. It is a G-type main-sequence star. HAT-P-30 has a similar concentration of heavy elements compared to the Sun.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hydra |
| Right ascension | 08h 15m 47.9802s[1] |
| Declination | +05° 50′ 12.351″[1] |
| Apparent magnitude (V) | 10.35[2] |
| Characteristics | |
| Evolutionary stage | main sequence[1] |
| Spectral type | G0[3] |
| Astrometry | |
| Radial velocity (Rv) | 44.14[1] km/s |
| Proper motion (μ) | RA: −17.231[1] mas/yr Dec.: +23.875[1] mas/yr |
| Parallax (π) | 4.8037 ± 0.0099 mas[1] |
| Distance | 679 ± 1 ly (208.2 ± 0.4 pc) |
| Details | |
| Mass | 1.175±0.025[4] M☉ |
| Radius | 1.314±0.015[4] R☉ |
| Luminosity | 2.37±0.01[1] L☉ |
| Surface gravity (log g) | 4.270±0.007[4] cgs |
| Temperature | 6,252±100[4] K |
| Metallicity [Fe/H] | −0.079±0.079[4] dex |
| Rotational velocity (v sin i) | 3.6±0.4[5] km/s |
| Age | 4.1±0.6[1] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The faint stellar companion was detected in 2013 at a projected separation of 3.842±0.007″.[7]
Planetary system
editIn 2011 a transiting hot Jupiter planet b was independently detected by two teams.[8][5]
The planetary orbit is strongly misaligned with the equatorial plane of the star, the misalignment angle being equal to 73.5±9.0°.[8]
Since 2022, an additional planet in the system is suspected based on transit timing variations.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.723±0.023 MJ | 0.04114±0.00030 | 2.8106006±0.0000004 | 0 | 82.56±0.08° | 1.426±0.020 RJ |
References
edit- ^ a b c d e f g h i 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.
- ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics, 355: L27–L30, Bibcode:2000A&A...355L..27H, ISSN 0004-6361
- ^ Ginski, C.; Mugrauer, M.; Seeliger, M.; Löhne, T. (November 2013), "The multiplicity status of three exoplanet host stars", Astronomy & Astrophysics, 559: 6, Bibcode:2013A&A...559A..71G, doi:10.1051/0004-6361/201322274
- ^ a b c d e f g Bai, Lu; Gu, Shenghong; Wang, Xiaobin; Sun, Leilei; Kwok, Chi-Tai; Hui, Ho-Keung (2022), "WASP-35 and HAT-P-30/WASP-51: Reanalysis using TESS and Ground-based Transit Photometry", The Astronomical Journal, 163 (5): 208, arXiv:2203.02866, Bibcode:2022AJ....163..208B, doi:10.3847/1538-3881/ac5b6a, S2CID 247292453
- ^ a b Enoch, B.; Anderson, D. R.; Barros, S. C. C.; Brown, D. J. A.; Cameron, A. Collier; Faedi, F.; Gillon, M.; Hébrard, G.; Lister, T. A.; Queloz, D.; Santerne, A.; Smalley, B.; Street, R. A.; Triaud, A. H. M. J.; West, R. G.; Bouchy, F.; Bento, J.; Butters, O.; Fossati, L.; Haswell, C. A.; Hellier, C.; Holmes, S.; Jehen, E.; Lendl, M.; Maxted, P. F. L.; McCormac, J.; Miller, G. R. M.; Moulds, V.; Moutou, C.; et al. (2011), "WASP-35b, WASP-48b, and HAT-P-30b/WASP-51b: Two New Planets and an Independent Discovery of a Hat Planet", The Astronomical Journal, 142 (3): 86, arXiv:1104.2827, Bibcode:2011AJ....142...86E, doi:10.1088/0004-6256/142/3/86, S2CID 63996398
- ^ "BD+06 1909", SIMBAD, Centre de données astronomiques de Strasbourg
- ^ Wöllert, Maria; Brandner, Wolfgang (2015), "A Lucky Imaging search for stellar sources near 74 transit hosts", Astronomy & Astrophysics, 579: A129, arXiv:1506.05456, Bibcode:2015A&A...579A.129W, doi:10.1051/0004-6361/201526525, S2CID 118903879
- ^ a b Johnson, John Asher; Winn, J. N.; Bakos, G. Á.; Hartman, J. D.; Morton, T. D.; Torres, G.; Kovács, Géza; Latham, D. W.; Noyes, R. W.; Sato, B.; Esquerdo, G. A.; Fischer, D. A.; Marcy, G. W.; Howard, A. W.; Buchhave, L. A.; Fűrész, G.; Quinn, S. N.; Béky, B.; Sasselov, D. D.; Stefanik, R. P.; Lázár, J.; Papp, I.; Sári, P. (2011), "HAT-P-30b: A transiting hot Jupiter on a highly oblique orbit", The Astrophysical Journal, 735 (1): 24, arXiv:1103.3825, Bibcode:2011ApJ...735...24J, doi:10.1088/0004-637X/735/1/24, S2CID 53689766