TOI-1518
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cepheus[1] |
| Right ascension | 23h 29m 04.22518s[2] |
| Declination | +67° 02′ 05.3786″[2] |
| Apparent magnitude (V) | 8.95[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | F0[4] |
| Astrometry | |
| Radial velocity (Rv) | −10.22±0.35[2] km/s |
| Proper motion (μ) | RA: −7.633 mas/yr[2] Dec.: −4.948 mas/yr[2] |
| Parallax (π) | 4.3672±0.0141 mas[2] |
| Distance | 747 ± 2 ly (229.0 ± 0.7 pc) |
| Details[4] | |
| Mass | 1.79±0.26 M☉ |
| Radius | 1.950±0.048 R☉ |
| Surface gravity (log g) | 4.1±0.2 cgs |
| Temperature | 7300±100 K |
| Metallicity [Fe/H] | −0.10±0.12 dex |
| Rotational velocity (v sin i) | 85.1±6.3 km/s |
| Other designations | |
| AG+66 1198, BD+66 1610, SAO 20657, PPM 24491, TOI-1518, TIC 427761355, TYC 4292-873-1[3] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
TOI-1518 is a F0-type main sequence star located in the Constellation of Cepheus around 747 light-years from Earth.[5]
Planetary system
TOI-1518b is the only known planet in the system. It is an ultra-hot Jupiter with iron in its atmosphere. The close orbit causes the radius of this planet to be inflated and heat to a temperature of 2492 K.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | <2.3 MJ | 0.0389±0.0011 | 1.902603(11) | <0.01 | 77.84+0.23 −0.26° |
1.875±0.053 RJ |
References
- ^ 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 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 "BD+66 1610". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 1 November 2025.
- ^ a b c d Cabot, Samuel H. C.; Bello-Arufe, Aaron; Mendonça, João M.; Tronsgaard, René; Wong, Ian; Zhou, George; Buchhave, Lars A.; Fischer, Debra A.; Stassun, Keivan G.; Antoci, Victoria; Baker, David; Belinski, Alexander A.; Benneke, Björn; Bouma, Luke G.; Christiansen, Jessie L. (2021-10-27). "TOI-1518b: A Misaligned Ultra-hot Jupiter with Iron in Its Atmosphere". The Astronomical Journal. 162 (5): 218. arXiv:2108.11403. Bibcode:2021AJ....162..218C. doi:10.3847/1538-3881/ac1ba3. ISSN 0004-6256.
- ^ "TOI-1518 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2025-10-31.