KELT-24 (HD 93148, MASCARA-3) is a single star in the constellation Ursa Major at a distance of approximately 316 light-years (about 96.8 parsecs) from Sun. The apparent magnitude of the star is +8.33m. The star's age is estimated to be about 1.6 billion years.[2][3][4] As an F-type main-sequence star, it is similar to the Sun, but slightly hotter and more luminous.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ursa Major |
| Right ascension | 10h 47m 38.35063s[1] |
| Declination | +71° 39′ 21.1525″[1] |
| Characteristics | |
| Evolutionary stage | main sequence star |
| Spectral type | F7V |
| Variable type | planetary transit |
| Astrometry | |
| Radial velocity (Rv) | −5.54±0.24[1] km/s |
| Proper motion (μ) | RA: −56.061(17) mas/yr[1] Dec.: −34.526(21) mas/yr[1] |
| Parallax (π) | 10.3218 ± 0.0180 mas[1] |
| Distance | 316.0 ± 0.6 ly (96.9 ± 0.2 pc) |
| Details | |
| Mass | 1.30 M☉ |
| Radius | 1.52 R☉ |
| Luminosity | 0.565 L☉ |
| Temperature | 6415 K |
| Metallicity [Fe/H] | -0.090 Fe dex |
| Age | 2.8 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nomenclature
editThis star was first catalogued in the Henry Draper Catalogue as HD 93148. The Henry Draper Catalogue gave stars visible to the naked eye in suitable conditions a designation, indicating that this star can be seen with the naked eye. But in 2019, the Multi-site All-Sky Camera and the Kilodegree Extremely Little Telescope announced the discovery of the exoplanet KELT-24b/MASCARA-3b around this star. Thus, it is most commonly known as KELT-24, although the star is sometimes catalogued as MASCARA-3.
Characteristics
editKELT-24 is a yellow-white star with a spectral class of F5 or F7. Its mass is about 1.4 M☉, its radius is about 1.555 R☉, and its luminosity is about 3.466 L☉. Its effective temperature is about 6437 K.
Planetary system
editIn 2019, the discovery of the Hot Jupiter type planet KELT-24b/MASCARA-3b was announced by the Multi-site All-Sky CAmeRA and the Kilodegree Extremely Little Telescope. TESS data confirmed that no additional companions are orbiting this star.[5][6] Since this discovery, the system is now called KELT-24 or MASCARA-3.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 5.18 MJ | 0.06969 | 5.6 | 0.08 | 83.11° | 1.272 RJ |
References
edit- ^ a b c d e 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.
- ^ "KELT-24 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 10 September 2023.
- ^ Rodriguez, Joseph E.; Eastman, Jason D.; Zhou, George; Quinn, Samuel N.; Beatty, Thomas G.; Penev, Kaloyan; Johnson, Marshall C.; Cargile, Phillip A.; Latham, David W.; Bieryla, Allyson; Collins, Karen A.; Dressing, Courtney D.; Ciardi, David R.; Relles, Howard M.; Murawski, Gabriel; Nishiumi, Taku; Yonehara, Atsunori; Ishimaru, Ryo; Yoshida, Fumi; Gregorio, Joao; Lund, Michael B.; Stevens, Daniel J.; Stassun, Keivan G.; Gaudi, B. Scott; Colón, Knicole D.; Pepper, Joshua; Narita, Norio; Awiphan, Supachai; Chuanraksasat, Pongpichit; Benni, Paul; Zambelli, Roberto; Garrison, Lehman H.; Wilson, Maurice L.; Cornachione, Matthew A.; Wang, Sharon X.; Labadie-Bartz, Jonathan; Rodríguez, Romy; Siverd, Robert J.; Yao, Xinyu; Bayliss, Daniel; Berlind, Perry; Calkins, Michael L.; Christiansen, Jessie L.; Cohen, David H.; Conti, Dennis M.; Curtis, Ivan A.; Depoy, D. L.; Esquerdo, Gilbert A.; Evans, Phil; Feliz, Dax; Fulton, Benjamin J.; Holoien, Thomas W.-S.; James, David J.; Jayasinghe, Tharindu; Jang-Condell, Hannah; Jensen, Eric L. N.; Johnson, John A.; Joner, Michael D.; Khakpash, Somayeh; Kielkopf, John F.; Kuhn, Rudolf B.; Manner, Mark; Marshall, Jennifer L.; McLeod, Kim K.; McCrady, Nate; Oberst, Thomas E.; Oelkers, Ryan J.; Penny, Matthew T.; Reed, Phillip A.; Sliski, David H.; Shappee, B. J.; Stephens, Denise C.; Stockdale, Chris; Tan, Thiam-Guan; Trueblood, Mark; Trueblood, Pat; Villanueva, Steven; Wittenmyer, Robert A.; Wright, Jason T. (23 October 2019). "KELT-24b: A 5M J Planet on a 5.6 day Well-aligned Orbit around the Young V = 8.3 F-star HD 93148". The Astronomical Journal. 158 (5): 197. arXiv:1906.03276. Bibcode:2019AJ....158..197R. doi:10.3847/1538-3881/ab4136. ISSN 1538-3881.
- ^ Pillitteri, I.; Colombo, S.; Micela, G.; Wolk, S. J. (1 May 2023). "The X-ray activity of F stars with hot Jupiters: KELT-24 versus WASP-18". Astronomy & Astrophysics. 673: A61. arXiv:2304.00854. Bibcode:2023A&A...673A..61P. doi:10.1051/0004-6361/202245467. ISSN 0004-6361. S2CID 257913773. Retrieved 10 September 2023.
- ^ Maciejewski, G. (2020), "Search for Planets in Hot Jupiter Systems with Multi-Sector TESS Photometry. I. No Companions in Planetary Systems KELT-18, KELT-23, KELT-24, Qatar-8, WASP-62, WASP-100, WASP-119, and WASP-126", Acta Astronomica, 70 (3): 181, arXiv:2010.11977, Bibcode:2020AcA....70..181M, doi:10.32023/0001-5237/70.3.2, S2CID 225061977
- ^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 10 September 2023.
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