TOI-1518

TOI-1518
Observation data; Epoch J2000.0 Equinox ICRS
Constellation	Cepheus
Right ascension	23h 29m 04.22518s
Declination	+67° 02′ 05.3786″
Apparent magnitude (V)	8.95
Characteristics
Evolutionary stage	main sequence
Spectral type	F0
Astrometry
Radial velocity (Rv)	−10.22±0.35 km/s
Proper motion (μ)	RA: −7.633 mas/yr ; Dec.: −4.948 mas/yr
Parallax (π)	4.3672±0.0141 mas
Distance	747 ± 2 ly ; (229.0 ± 0.7 pc)
Details
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
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.

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.

The TOI-1518 planetary system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination (°)	Radius
b	<2.3 `M`_J	0.0389±0.0011	1.902603(11)	<0.01	77.84+0.23 −0.26	1.875±0.053 `R`_J

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.
1 2 3 4 5 6 7 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.
1 2 "BD+66 1610". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 1 November 2025.
1 2 3 4 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.

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[constellation-1] 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.

[GaiaDR3-2] 1 2 3 4 5 6 7 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.

[SIMBAD-3] 1 2 "BD+66 1610". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 1 November 2025.

[Cabot2021-4] 1 2 3 4 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.

[5] "TOI-1518 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2025-10-31.