HD 66428

From Wikipedia, the free encyclopedia

HD 66428
Observation data
Epoch J2000.0
Constellation
(pronunciation)
Monoceros
Right ascension 08h 03m 28.665s
Declination -01° 09′ 45.75″
Apparent magnitude (V) 8.25
Distance 179 ± 12.4 ly
(55 ± 3.8 pc)
Spectral type G3V
Other designations
BD-00º1891, HIP 39417, SAO 135426.

HD 66428 is a G-type yellow dwarf star similar to our Sun in the constellation Monoceros. It has apparent magnitude 8.25 and it is 179 light years away.

This star has precise mass of 1.14552 solar mass. The precision comes from Corot mission that measured stellar seismology.

[edit] HD 66428 b

HD 66428 b
Extrasolar planet List of extrasolar planets
Orbital elements
Semimajor axis (a) 3.18 ± 0.19 AU
Eccentricity (e) 0.465 ± 0.03
Orbital period (P) 1973 ± 31 d
Angular distance (θ) 57.818 mas
Longitude of
periastron
(ω) 152.9 ± 3.9°
Time of periastron (T0) 2,412,139 ± 16 JD
Semi-amplitude (K) 48.3 ± 2.7 m/s
Physical characteristics
Mass (m) >2.82 MJ
Discovery information
Discovery date July 15, 2006
Discoverer(s) Butler et al.
Detection method radial velocity
Discovery status published

HD 66428 b is a long-period upper jovian planet that takes 1973 days to orbit around HD 66428. The average distance is 3.18 AU. The planet is eccentric Jupiter; at periastron, the distance is 1.70 AU and at apastron, the distance is 4.66 AU.

[edit] References

[edit] External links