WASP-54
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. The age of WASP-54 is slightly older than the Sun's at 6.9+1.0
−1.9 billion years.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 41m 49.0302s |
| Declination | −00° 07′ 41.0337″ |
| Apparent magnitude (V) | 10.41 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | F8 |
| Astrometry | |
| Radial velocity (Rv) | -2.82 km/s |
| Proper motion (μ) | RA: -24.685 mas/yr Dec.: -4.687 mas/yr |
| Parallax (π) | 3.9522 ± 0.0692 mas |
| Distance | 830 ± 10 ly (253 ± 4 pc) |
| Orbit | |
| Primary | WASP-54A |
| Companion | WASP-54B |
| Semi-major axis (a) | 5.728±0.006" (1450 AU) |
| Details | |
| WASP-54A | |
| Mass | 1.213±0.032 M☉ |
| Radius | 1.828+0.091 −0.081 R☉ |
| Surface gravity (log g) | 4.00±0.02 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 M☉ |
| Temperature | 3216+26 −25 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
A multiplicity survey in 2017 did detect a red dwarf stellar companion WASP-54B 5.7″ away from WASP-54A. The companion was proven to be co-moving in 2020.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.