# Appendix II — Miscellaneous data for bodies in the TYCHOS system

EARTH orbital Ø: 113,230,656 Mkm (the “PVP” orbit) Orbital circumference : 355,724,597 km Diameter at equator: 12,756.3 km Equatorial circumference: 40,075 km Orbital speed: 1.601169 km/h or 0.000444 km/s (or 0.00149326% of the Sun’s orbital speed) Rotational period : 23 hours 56 minutes and 4 seconds (or 23.9345 h) Rotational speed: 1,676 km/h (i.e. 40,075Km