PLANET      a(AU)   P(years)
Mercury		0.3871	0.2408
Venus		0.7233	0.6152
Earth		1.0     1.0
Ceres		2.767	4.603
Mars		1.5236	1.8808
Jupiter		5.204	11.862
Saturn		9.583	29.457
Uranus		19.201	84.012
Neptune		30.048	164.79
Pluto		39.482	247.68
Haumea		43.132	283.28
Makemake	45.791	309.88
Eris		67.89	559