HD 88133
HD 88133 is a yellow star with an orbiting exoplanet in the equatorial constellation of Leo. It has an apparent visual magnitude of 8.01, which is too faint to be visible to the naked eye. With a small telescope it should be easily visible. The distance to this system, as measured through parallax, is 240 light years, but it is slowly drifting closer with a radial velocity of −3.6 km/s.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Leo |
| Right ascension | 10h 10m 07.676s |
| Declination | +18° 11′ 12.73″ |
| Apparent magnitude (V) | 8.01 |
| Characteristics | |
| Spectral type | G8V |
| B−V color index | 0.810±0.015 |
| Astrometry | |
| Radial velocity (Rv) | −3.62±0.14 km/s |
| Proper motion (μ) | RA: −11.135 mas/yr Dec.: −264.912 mas/yr |
| Parallax (π) | 13.5882 ± 0.0249 mas |
| Distance | 240.0 ± 0.4 ly (73.6 ± 0.1 pc) |
| Absolute magnitude (MV) | 3.50 |
| Details | |
| Mass | 1.23±0.16 M☉ |
| Radius | 2.01±0.04 R☉ |
| Luminosity | 3.14±0.02 L☉ |
| Surface gravity (log g) | 3.82 cgs |
| Temperature | 5,414±97 K |
| Metallicity [Fe/H] | 0.26 dex |
| Rotational velocity (v sin i) | 4.9 km/s |
| Age | 5.08 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is classified as an ordinary G-type main-sequence star with a stellar classification of G8V. However, D. A. Fischer and associates in 2005 listed a class of G5 IV, suggesting it is instead a subgiant star that is evolving away from the main sequence having exhausted the hydrogen at its core. It is about 5 billion years old and is spinning with a projected rotational velocity of 4.9 km/s. The star has 23% more mass than the Sun and has double the Sun's girth. It is radiating over three times the luminosity of the Sun from its photosphere at an effective temperature of 5,414 km/s.