WASP-121
WASP-121, also known as CD-38 3220, is a magnitude 10.4 star located approximately 858 light-years (263 parsecs) away in the constellation Puppis. WASP-121 has a mass and radius similar to the Sun's. It hosts one known exoplanet.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 10m 24.06046s |
| Declination | −39° 05′ 50.5712″ |
| Apparent magnitude (V) | 10.4 |
| Characteristics | |
| Spectral type | F6V |
| Apparent magnitude (B) | 11.00 |
| Apparent magnitude (V) | 10.51 |
| Apparent magnitude (J) | 9.625 |
| Apparent magnitude (H) | 9.439 |
| Apparent magnitude (K) | 9.374 |
| Astrometry | |
| Radial velocity (Rv) | 38.25±0.22 km/s |
| Proper motion (μ) | RA: −3.735 mas/yr Dec.: 25.663 mas/yr |
| Parallax (π) | 3.7996 ± 0.0104 mas |
| Distance | 858 ± 2 ly (263.2 ± 0.7 pc) |
| Details | |
| Mass | 1.353 M☉ |
| Radius | 1.458 R☉ |
| Temperature | 6,460.0 K |
| Metallicity [Fe/H] | 0.13 dex |
| Rotational velocity (v sin i) | 11.90±0.31 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
The star, although metal-rich in terms of overall contents of heavy elements, is depleted of carbon. The carbon to oxygen molar ratio of 0.23±0.05 for WASP-121 is well below the solar ratio of 0.55.
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