Hellenica World

HD 66428

HD 66428 is a G-type main sequence star located approximately 179 light-years away in the constellation of Monoceros. This star is similar to our Sun with an apparent magnitude of 8.25, an effective temperature of 5705 ± 27 K and a solar luminosity 1.28. Its absolute magnitude is 11.1 while its U-V color index is 0.71. It is considered an inactive star and it is metal-rich ([Fe/H] = 0.310). [1][2][3] This star has a precise mass of 1.14552 solar masses. This precision comes from the Corot mission that measured asteroseismology.

Planetary system

In July 2006, a planet HD 66428 b was found by Paul Butler using the radial velocity method. The >2.82 MJ planet orbits at 3.18 AU away from the star.[1]

The HD 66428 system^[1]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity
b	>2.82 ± 0.27 M_J	3.18 ± 0.19	1973 ± 31	0.465 ± 0.030

References

1. ^ a b c d e f Butler, R.P. et al.'; Wright, J. T.; Marcy, G. W.; Fischer, D. A.; Vogt, S. S.; Tinney, C. G.; Jones, H. R. A.; Carter, B. D. et al. (2006). "Catalog of Nearby Exoplanets". Astrophysical Journal 646 (1): 505–522. doi:10.1086/504701. http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html. Retrieved 2008-12-16.
2. ^ a b Kashyap, V.L. et al.'; Drake, Jeremy J.; Saar, Steven H. (2008). "Extrasolar Giant Planets and X-Ray Activity" (abstact). Astrophysical Journal 687 (2): 1339–1356. doi:10.1086/591922. http://www.iop.org/EJ/abstract/0004-637X/687/2/1339/.
3. ^ Sousa, S.G. et al.'; Santos, N. C.; Mayor, M.; Udry, S.; Casagrande, L.; Israelian, G.; Pepe, F.; Queloz, D. et al. (2008). "Spectroscopic parameters for 451 stars in the HARPS GTO planet search program" (PDF). Astronomy & Astrophysics 487: 373–381. doi:10.1051/0004-6361:200809698. http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/pdf/2008/31/aa09698-08.pdf. Retrieved 2008-12-16.