HD 45364

HD 45364
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Canis Major
Right ascension 06h 25m 38.48s[1]
Declination −31° 28 51.4[1]
Apparent magnitude (V) 8.07
Characteristics
Spectral type G8V
B−V color index 0.719
V−R color index 0.01
Astrometry
Radial velocity (Rv)15.9 km/s
Proper motion (μ) RA: 53.22 ± 0.48 [1] mas/yr
Dec.: −13.20 ± 0.77 [1] mas/yr
Parallax (π)30.59 ± 0.68[1] mas
Distance107 ± 2 ly
(32.7 ± 0.7 pc)
Absolute magnitude (MV)+5.50
Other designations
HIP 30579, SAO 196806
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia
data

HD 45364 is a star approximately 107 light years away from Earth in the constellation of Canis Major. As of August 2008 there are two confirmed extrasolar planets orbiting around it.[2]

Planetary system

HD 45364 is one of only a relative few systems that have had more than one exoplanet discovered in its orbit. The two planets, HD 45364 b and HD 45364 c respectively, were both discovered in August 2008.

The HD 45364 planetary system[2]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥0.1872 MJ 0.6813 226.93 ± 0.37 0.1684 ± 0.190
c ≥0.6579 MJ 0.8972 342.85 ± 0.28 0.0974 ± 0.012

Formation scenario

Hydrodynamic formation scenario of HD45364
Hydrodynamic formation scenario of HD45364

A detailed analysis of the formation scenario revealed that the previously reported orbital configuration might not be correct.[3] The eccentricities are a factor of 4-5 too large to be consistent with standard planet formation theories. This is the first time that planet formation theory was able to predict new orbital parameters of a planetary system.

References

Coordinates: 06h 25m 38s, −31° 28′ 51″