Astronomy:WASP-90
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Equuleus |
| Right ascension | 21h 02m 07.68s[1] |
| Declination | +07° 03′ 22.52″[1] |
| Apparent magnitude (V) | 11.63[2] |
| Characteristics | |
| Spectral type | F6IV/V[3] |
| Astrometry | |
| Proper motion (μ) | RA: −9.074±0.108[1] mas/yr Dec.: +5.683±0.103[1] mas/yr |
| Parallax (π) | 2.1200 ± 0.0872[1] mas |
| Distance | 1,540 ± 60 ly (470 ± 20 pc) |
| Details[3] | |
| Mass | 1.55±0.10 M☉ |
| Radius | 1.98±0.09 R☉ |
| Luminosity | 4.3±0.2[1] L☉ |
| Surface gravity (log g) | 4.03±0.03 cgs |
| Temperature | 6228+125 −133[4] K |
| Metallicity [Fe/H] | 0.11±0.14 dex |
| Rotational velocity (v sin i) | 6.0±0.5 km/s |
| Age | 4.40+8.40 −2.40 Gyr |
| Other designations | |
Gaia DR2 1737061349198867456 | |
| Database references | |
| SIMBAD | data |
WASP-90 is a faint 11th magnitude star located in the northern constellation Equuleus. With an apparent magnitude of 11.63, it is too faint to be detected with the naked eye, but can be seen with a telescope, and is located 1,540 ly (470 pc) from the Solar System.
Properties
WASP-69 has a classification of F6. The paper states that the stars are slightly evolved, with radius up to twice that of the Sun. WASP-69 is 55% more massive than the Sun, and almost twice as large. It radiates at 4.3 times the Sun's luminosity from its photosphere at an effective temperature of 6,430 K. Despite it being a similar age, the star has a high metallicity that is 28% greater than that of the Sun.
Planetary system
In 2016, a bloated "hot Jupiter" was discovered orbiting the star. Due to the hosts state, the planet is irradiated.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.63±0.07 MJ | 0.06±0.00 | 3.92±0.00 | 0.00 | 82.1±0.4° | 1.63±0.09 RJ |
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ Watson, C. L.; Henden, A. A.; Price, A. (1 May 2006). "The International Variable Star Index (VSX)". Society for Astronomical Sciences Annual Symposium 25: 47. Bibcode: 2006SASS...25...47W. https://ui.adsabs.harvard.edu/abs/2006SASS...25...47W/abstract.
- ↑ 3.0 3.1 3.2 West, R. G.; Hellier, C.; Almenara, J.-M.; Anderson, D. R.; Barros, S. C. C.; Bouchy, F.; Brown, D. J. A.; Collier Cameron, A. et al. (1 January 2016). "Three irradiated and bloated hot Jupiters:. WASP-76b, WASP-82b, and WASP-90b". Astronomy and Astrophysics 585: A126. doi:10.1051/0004-6361/201527276. ISSN 0004-6361. Bibcode: 2016A&A...585A.126W.
- ↑ Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; De Lee, Nathan; Collins, Kevin; Latham, David W. et al. (1 October 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256. Bibcode: 2019AJ....158..138S.
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