WASP-54
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 41m 49.0302s[1] |
| Declination | −00° 07′ 41.0337″[1] |
| Apparent magnitude (V) | 10.41 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | F8 |
| Astrometry | |
| Radial velocity (Rv) | -2.82[1] km/s |
| Proper motion (μ) | RA: -24.685[1] mas/yr Dec.: -4.687[1] mas/yr |
| Parallax (π) | 3.9522±0.0692 mas[1] |
| Distance | 830 ± 10 ly (253 ± 4 pc) |
| Orbit[2] | |
| Primary | WASP-54A |
| Companion | WASP-54B |
| Semi-major axis (a) | 5.728±0.006" (1450 AU) |
| Details[3] | |
| WASP-54A | |
| Mass | 1.213±0.032 M☉ |
| Radius | 1.828+0.091 −0.081 R☉ |
| Surface gravity (log g) | 4.00±0.02[4] cgs |
| Temperature | 6100±100 K |
| Metallicity [Fe/H] | -0.27±0.08 dex |
| Rotational velocity (v sin i) | 4.0±0.8 km/s |
| Age | 6.9+1.0 −1.9 Gyr |
| WASP-54B | |
| Mass | 0.19±0.01[2] M☉ |
| Temperature | 3216+26 −25[2] K |
| Other designations | |
| BD+00 3088, Gaia DR2 3661983850663908608, TYC 4967-678-1, GSC 04967-00678, 2MASS J13414903-0007410[5] | |
| Database references | |
| SIMBAD | 3088 data |
WASP-54, also known as BD+00 3088, is a binary star system about 825 light-years away. The primary, WASP-54A, is a F-type main-sequence star, accompanied by the red dwarf WASP-54B on a wide orbit. WASP-54 is depleted in heavy elements, having 55% of the solar abundance of iron.[3] The age of WASP-54 is slightly older than the Sun's at 6.9+1.0
−1.9 billion years.[3]
A multiplicity survey in 2017 did detect a red dwarf stellar companion WASP-54B 5.7″ away from WASP-54A.[6] The companion was proven to be co-moving in 2020.[2]
Planetary system
In 2012 a transiting hot Jupiter planet b was detected on a tight, mildly eccentric[3] orbit around WASP-54A.[7]
Planetary equilibrium temperature is 1742+49
−69 K.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.606±0.018 MJ | 0.04988+0.00043 −0.00045 |
3.6936411±0.0000059 | <0.06 | 84.97±0.61° | 1.653+0.090 −0.083 RJ |
References
- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d A multiplicity study of transiting exoplanet host stars. I. High-contrast imaging with VLT/SPHERE, 2020, arXiv:2001.08224
- ^ a b c d e The GAPS Programme with HARPS-N@TNG XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets, 2017, arXiv:1704.00373
- ^ Correcting the spectroscopic surface gravity using transits and asteroseismology No significant effect on temperatures or metallicities with ARES and MOOG in local thermodynamic equilibrium
- ^ "BD+00 3088". SIMBAD. Centre de données astronomiques de Strasbourg.
- ^ High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). II. Lucky Imaging results from 2015 and 2016, 2017, arXiv:1709.07476
- ^ a b WASP-54b, WASP-56b and WASP-57b: Three new sub-Jupiter mass planets from SuperWASP, 2012, arXiv:1210.2329
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