Astronomy:KELT-24
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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)[1] mas/yr Dec.: −34.526(21)[1] mas/yr |
| Parallax (π) | 10.3218 ± 0.0180[1] mas |
| 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 |
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.
Nomenclature
This 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
KELT-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
In 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
- ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ "KELT-24 | NASA Exoplanet Archive". https://exoplanetarchive.ipac.caltech.edu/overview/KELT-24.
- ↑ Rodriguez, Joseph E.; Eastman, Jason D.; Zhou, George; Quinn, Samuel N.; Beatty, Thomas G.; Penev, Kaloyan; Johnson, Marshall C.; Cargile, Phillip A. et al. (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. doi:10.3847/1538-3881/ab4136. ISSN 1538-3881. Bibcode: 2019AJ....158..197R.
- ↑ 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" (in en). Astronomy & Astrophysics 673: A61. doi:10.1051/0004-6361/202245467. ISSN 0004-6361. Bibcode: 2023A&A...673A..61P. https://www.aanda.org/articles/aa/full_html/2023/05/aa45467-22/aa45467-22.html. 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, doi:10.32023/0001-5237/70.3.2, Bibcode: 2020AcA....70..181M
- ↑ "Exoplanet-catalog" (in en). https://exoplanets.nasa.gov/exoplanet-catalog/7472/kelt-24-b/.
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