CD-38 2551
CD-38 2551, also known as WASP-63, is a single G-type main-sequence star about 960 light-years away. The star age is much older than the Sun's at approximately 8.3+1.3
−1.2 billion years. WASP-63 is slightly enriched in heavy elements, having 120% of the solar abundance of iron.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Columba |
| Right ascension | 06h 17m 20.7486s[1] |
| Declination | −38° 19′ 23.7542″[1] |
| Apparent magnitude (V) | 11.15 |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | G8V |
| Astrometry | |
| Radial velocity (Rv) | -23.07[1] km/s |
| Proper motion (μ) | RA: -17.558[1] mas/yr Dec.: -27.297[1] mas/yr |
| Parallax (π) | 3.4114 ± 0.0237[1] mas |
| Distance | 956 ± 7 ly (293 ± 2 pc) |
| Details[2] | |
| Mass | 1.10+0.06 −0.04 M☉ |
| Radius | 1.76+0.11 −0.08 R☉ |
| Surface gravity (log g) | 4.01±0.03[3] cgs |
| Temperature | 5550±100 K |
| Metallicity [Fe/H] | 0.08±0.07 dex |
| Rotational velocity (v sin i) | 2.8±0.5 km/s |
| Age | 8.3+1.3 −1.2 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | 2551 data |
Planetary system
In 2012 a transiting gas giant planet b was detected on a tight, circular orbit.[5] Its equilibrium temperature is 1536±37 K, and measured dayside temperature is 1547±308 K.[6] The planet is similar to Saturn in mass but is highly inflated due to proximity to the parent star. The planetary atmosphere contains water and likely has a high cloud deck of indeterminate composition.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.339±0.03 MJ | 0.05417+0.00067 −0.00089 |
4.3780900±0.000006 | 0.026+0.040 −0.029 |
87.8±1.3° | 1.33±0.24 RJ |
References
- 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.
- The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets, 2017, arXiv:1704.00373
- Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott (2016), "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes", The Astronomical Journal, 153 (3): 136, arXiv:1609.04389, doi:10.3847/1538-3881/aa5df3, S2CID 119219062
- "CD-38 2551". SIMBAD. Centre de données astronomiques de Strasbourg.
- Hellier, Coel; Anderson, D. R.; Collier Cameron, A.; Doyle, A. P.; Fumel, A.; Gillon, M.; Jehin, E.; Lendl, M.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Ségransan, D.; Smalley, B.; Smith, A. M. S.; Southworth, J.; Triaud, A. H. M. J.; Udry, S.; West, R. G. (2012), "Seven transiting hot-Jupiters from WASP-South, Euler and TRAPPIST: WASP-47b, WASP-55b, WASP-61b, WASP-62b, WASP-63b, WASP-66b & WASP-67b", Monthly Notices of the Royal Astronomical Society, 426 (1): 739–750, arXiv:1204.5095, Bibcode:2012MNRAS.426..739H, doi:10.1111/j.1365-2966.2012.21780.x, S2CID 54713354
- Statistical characterization of hot Jupiter atmospheres using Spitzer's secondary eclipses, 2019, arXiv:1901.07040
- Community targets of JWST's Early Release Science program: evaluation of WASP-63b, 2017, arXiv:1704.07421
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