Astronomy:WASP-159
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Caelum |
| Right ascension | 04h 32m 32.76s[1] |
| Declination | −38° 58′ 05.95″[1] |
| Apparent magnitude (V) | 12.84±0.24[2] |
| Characteristics | |
| Spectral type | F9IV[3] |
| B−V color index | -0.21[2] |
| Astrometry | |
| Radial velocity (Rv) | +35.16±0.01[3] km/s |
| Proper motion (μ) | RA: −0.767±0.034[1] mas/yr Dec.: +5.443±0.042[1] mas/yr |
| Parallax (π) | 1.3689 ± 0.0206[1] mas |
| Distance | 2,380 ± 40 ly (730 ± 10 pc) |
| Details[3] | |
| Mass | 1.41±0.12 M☉ |
| Radius | 2.11±0.10 R☉ |
| Luminosity | 4.78+0.23 −0.21[4] L☉ |
| Surface gravity (log g) | 3.94±0.04 cgs |
| Temperature | 6,120±140 K |
| Metallicity [Fe/H] | +0.22±0.12 dex |
| Rotational velocity (v sin i) | 5.7±0.4 km/s |
| Age | 3.40±0.95 Gyr |
| Other designations | |
Gaia DR2 4864759888238232320 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
WASP-159 is a faint star located in the southern constellation Caelum. With an apparent magnitude of 12.84, a powerful telescope is needed to see the star. The star is located 2,380 light-years (730 parsecs) based on parallax, but is drifting away with a heliocentric radial velocity of +35.16 km/s.
Properties
WASP-159 is a F-type subgiant with 1.41 times the Sun's mass, and double the Sun's radius. It radiates at 4.78 times the Sun's luminosity from its photosphere at an effective temperature of 6,120 K. WASP-159 is about 3 billion years old, and is metal-rich like many other planetary hosts.
Planetary system
In 2019, SuperWASP discovered an inflated "hot Jupiter" orbiting the star.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.55±0.08 MJ | 0.06±0.00 | 3.84±0.00 | 0 | 88.1±1.4° | 1.38±0.09 RJ |
References
- ↑ 1.0 1.1 1.2 1.3 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.
- ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (1 March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H.
- ↑ 3.0 3.1 3.2 3.3 3.4 Hellier, Coel; Anderson, D. R.; Bouchy, F.; Burdanov, A.; Collier Cameron, A.; Delrez, L.; Gillon, M.; Jehin, E. et al. (1 January 2019). "New transiting hot Jupiters discovered by WASP-South, Euler/CORALIE, and TRAPPIST-South". Monthly Notices of the Royal Astronomical Society 482 (1): 1379–1391. doi:10.1093/mnras/sty2741. ISSN 0035-8711. Bibcode: 2019MNRAS.482.1379H.
- ↑ Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; De Lee, Nathan; Collins, Kevin; Latham, David W. et al. (October 2019). "The Revised TESS Input Catalog and Candidate Target List" (in en). The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256. Bibcode: 2019AJ....158..138S.
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