HD 45652
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Monoceros[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 8.10[1] |
| Characteristics | |
| Spectral type | G8-K0[3] |
| B−V Template:Engvar | Script error: No such module "val".[1] |
| V−R Template:Engvar | 0.5[4] |
| R−I Template:Engvar | 0.4[4] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[5] km/s |
| Proper motion (μ) | RA: Script error: No such module "val". mas/yr[2] Dec.: Script error: No such module "val". mas/yr[2] |
| Parallax (π) | 28.6477±0.0227 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 5.42[1] |
| Details | |
| Mass | Script error: No such module "val".[3] Script error: No such module "val".[6] Script error: No such module "val".[7] Template:Solar mass |
| Radius | Script error: No such module "val".[6] Template:Solar radius |
| Luminosity | Script error: No such module "val".[6] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val".[6] cgs |
| Temperature | Script error: No such module "val".[6] K |
| Metallicity [Fe/H] | Script error: No such module "val".[7] dex |
| Rotational velocity (v sin i) | 3.5[7] km/s |
| Age | Script error: No such module "val".[6] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[4] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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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).[8] This star has an apparent visual magnitude of 8.10,[1] 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,[2] but is drifting closer with a radial velocity of −5 km/s.[5] It shows a high proper motion, traversing the celestial sphere at an angular rate of Script error: No such module "val"..[9]
The measured atmospheric properties match a metal-rich late G- or early K-type dwarf star.[3] It is a middle-aged main sequence star, about five billion years old,[6] and is chromospherically inactive.[3] The star is smaller and less massive than the Sun.[6] It is radiating 61%[6] of the Sun's luminosity from its photosphere at an effective temperature of 5,342 K.[6] HD 45652 is spinning with a projected rotational velocity of 3.5 km/s.[7]
Planetary system
In May 2008, the discovery of an extrasolar planet, HD 45652 b, orbiting the star was announced. The planet was detected by the radial velocity method, using observations made from 2005 to 2007.[3] It has been assigned the name Viriato by the IAU Division C Working Group on Star Names.[10]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet
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References
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External links
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