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WASP-76
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pisces[2] |
| Right ascension | 01h 46m 31.8576s[3] |
| Declination | 02° 42′ 02.030″[3] |
| Apparent magnitude (V) | 9.52[4] |
| Characteristics | |
| Evolutionary stage | main sequence[5][3] |
| Spectral type | F7[5] |
| B−V color index | 0.61 |
| J−H color index | 0.21 |
| J−K color index | 0.3 |
| Astrometry | |
| Radial velocity (Rv) | −1.152±0.0033[6] km/s |
| Proper motion (μ) | RA: +45.531[3] mas/yr Dec.: −40.593[3] mas/yr |
| Parallax (π) | 5.2899±0.0826 mas[3] |
| Distance | 617 ± 10 ly (189 ± 3 pc) |
| Details | |
| Mass | 1.280±0.028[7] M☉ |
| Radius | 1.667±0.020[7] R☉ |
| Luminosity | 4.6[3] L☉ |
| Surface gravity (log g) | 4.4±0.1[5] cgs |
| Temperature | 6,250±100[5] K |
| Metallicity [Fe/H] | 0.23±0.1[5] dex |
| Rotational velocity (v sin i) | 3.3±0.6[5] km/s |
| Age | 5.3+6.1 −2.9[5] Gyr |
| Other designations | |
| WASP-76, 2MASS J01463185+0242019, Gaia DR3 2512326349403275520 | |
| Database references | |
| SIMBAD | data |
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WASP-76, also known as BD+01 316, is a yellow-white main sequence star in the constellation of Pisces. A suspected stellar companion at a projected separation of 85 astronomical units was reported in 2014.[8]
After about five billion years, WASP-76 has expanded and become more luminous than at the start of its main sequence life, but most probably has not yet reached the subgiant branch.[3][5]
Planetary system
[edit]
The "hot Jupiter" class planet WASP-76b was discovered around WASP-76 in 2013.
Analysis of transit-timing variations suggest an additional planet in the system.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.92 MJ | 0.0316±0.0002 | 1.80988132(12) | 0.00087±0.00031 | 87.88±0.16° | 1.842±0.024 RJ |
References
[edit]- ^ "Gemini North Detects Multiple Rock-Forming Elements in the Atmosphere of a Scorching Exoplanet" (Press release). NOIRLab. 2023-06-14. Retrieved 2025-06-13.
- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b c d e f g h 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.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 – L30. Bibcode:2000A&A...355L..27H.
- ^ a b c d e f g h West, R. G.; Hellier, C.; Almenara, J.-M.; Anderson, D. R.; Barros, S. C. C.; Bouchy, F.; Brown, D. J. A.; Collier Cameron, A.; Deleuil, M.; Delrez, L.; Doyle, A. P.; Faedi, F.; Fumel, A.; Gillon, M.; Gómez Maqueo Chew, Y.; Hébrard, G.; Jehin, E.; Lendl, M.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Ségransan, D.; Smalley, B.; Smith, A. M. S.; Southworth, J.; Triaud, A. H. M. J.; Udry, S. (2016). "Three irradiated and bloated hot Jupiters". Astronomy & Astrophysics. 585: A126. arXiv:1310.5607. doi:10.1051/0004-6361/201527276. S2CID 54746373.
- ^ Soubiran, C.; Jasniewicz, G.; Chemin, L.; Zurbach, C.; Brouillet, N.; Panuzzo, P.; Sartoretti, P.; Katz, D.; Le Campion, J. -F.; Marchal, O.; Hestroffer, D.; Thévenin, F.; Crifo, F.; Udry, S.; Cropper, M.; Seabroke, G.; Viala, Y.; Benson, K.; Blomme, R.; Jean-Antoine, A.; Huckle, H.; Smith, M.; Baker, S. G.; Damerdji, Y.; Dolding, C.; Frémat, Y.; Gosset, E.; Guerrier, A.; Guy, L. P.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv:1804.09370. Bibcode:2018A&A...616A...7S. doi:10.1051/0004-6361/201832795. S2CID 52952408.
- ^ a b c d Wang, Weilong; Gu, Shenghong; Wang, Xiaobin; Sun, Leilei; Lee, Byeong-Cheol; Kwok, Chi-Tai; Hui, Ho-Keung; Dou, Jiangpei; Xiang, Yue; Cao, Dongtao; Xu, Fukun (June 2025). "Observations and Studies on the Transiting Systems HAT-P-36, XO-2 and WASP-76". The Astronomical Journal. 169 (6): 342. Bibcode:2025AJ....169..342W. doi:10.3847/1538-3881/add1de. ISSN 0004-6256.
- ^ Ngo, Henry; Knutson, Heather A.; Hinkley, Sasha; Bryan, Marta; Crepp, Justin R.; Batygin, Konstantin; Crossfield, Ian; Hansen, Brad; Howard, Andrew W.; Johnson, John A.; Mawet, Dimitri; Morton, Timothy D.; Muirhead, Philip S.; Wang, Ji (2016). "Friends of Hot Jupiters. IV. Stellar Companions Beyond 50 au Might Facilitate Giant Planet Formation, but Most are Unlikely to Cause Kozai-Lidov Migration". The Astrophysical Journal. 827 (1): 8. arXiv:1606.07102. Bibcode:2016ApJ...827....8N. doi:10.3847/0004-637X/827/1/8.
