HD 45652
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Monoceros |
| Right ascension | 06h 29m 13.19200s |
| Declination | +10° 56′ 02.0059″ |
| Apparent magnitude (V) | 8.10 |
| Characteristics | |
| Spectral type | G8-K0 |
| B−V color index | 0.846±0.020 |
| V−R color index | 0.5 |
| R−I color index | 0.4 |
| Astrometry | |
| Radial velocity (Rv) | −5.040±0.0008 km/s |
| Proper motion (μ) | RA: 206.208 mas/yr Dec.: −62.550 mas/yr |
| Parallax (π) | 28.6477±0.0227 mas |
| Distance | 113.85 ± 0.09 ly (34.91 ± 0.03 pc) |
| Absolute magnitude (MV) | 5.42 |
| Details | |
| Mass | 0.83±0.05 M☉ 0.94±0.02 M☉ 0.91±0.03 M☉ |
| Radius | 0.91±0.02 R☉ |
| Luminosity | 0.61±0.01 L☉ |
| Surface gravity (log g) | 4.49±0.03 cgs |
| Temperature | 5,342±31 K |
| Metallicity [Fe/H] | 0.286±0.032 dex |
| Rotational velocity (v sin i) | 3.5 km/s |
| Age | 5.4±2.7 Gyr |
| Other designations | |
| Lusitânia, BD+11 1197, GC 8415, HD 45652, HIP 30905, SAO 95735, NLTT 16570 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 45652 is a star with an exoplanetary companion in the equatorial constellation of Monoceros. It was officially named Lusitânia on 17 December 2019, after the IAU100 press conference in Paris by the IAU (International Astronomical Union). This star has an apparent visual magnitude of 8.10, making it an 8th magnitude star that is too dim to be visible to the naked eye. The system is located at a distance of 114 light-years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −5 km/s. It shows a high proper motion, traversing the celestial sphere at an angular rate of 0.188 arcsec yr−1.
The measured atmospheric properties match a metal-rich late G- or early K-type dwarf star. It is a middle-aged main sequence star, about five billion years old, and is chromospherically inactive. The star is smaller and less massive than the Sun. It is radiating 61% of the Sun's luminosity from its photosphere at an effective temperature of 5,342 K. HD 45652 is spinning with a projected rotational velocity of 3.5 km/s.