Planet statistics
Distance from the Sun 
(in millions)
	Maximum:	67.6 miles 
				108.9 km
				0.728 AU

	Minimum:	66.7 miles 
				107.4 km
				0.718 AU

	Mean:		67.2 miles 
				108.2 km
				0.723 AU

Revolution period 
("one year"):	224.7 days

Rotation period (equatorial):	
	243 days (retrograde)

Mean orbital velocity per second:	21.8 miles (35 km)	
Inclination of axis:	178	

Orbital eccentricity:	0.007

Orbital inclination: 
	3.39 degrees

Diameter at equator:	
		7,523 miles 
		12,104 km
		0.95 x Earth's diameter

Oblateness:  0.006

Escape velocity per second:	6.4 miles (10.4 km)

Mean surface temperature:
	896F / 480C / 753° K

Mass:	4.87 x 10^24 kg 
	(Earth = 1):	0.815

Volume (Earth =1):	0.86

Density (water = 1):
		5.24 g/cm^3

Surface gravity:  5.24 m/s^2
		  (Earth = 1):	0.90

Maximum apparent diameter as seen from Earth 
	(seconds of arc): 65".2

Mean diameter of Sun as seen from the planet:	44' 15"

Albedo: 0.76

Oblateness: 0

Number of known moons: 0