mercbar.jpg (6001 bytes)

Mercury Facts



Mean distance from Sun: 0.3871 AU (57,910,000 km/35,980,000 mi)
Length of Year: 88 days
Rotation period: 58.65 days
Mean orbital velocity: 48 km/s (30 mi/s)
Inclination of axis: 2
Average temperature: 800 (427) day
-300 (-183) night
Diameter: 4,878 km (3,031 mi)
Number of observed satellites: 0
Comparisons with Earth:
Diameter: 0.38 x Earth's
Mean Distance from Sun: 0.387 x
Earth's Mass: 0.055 x Earth's
Density: slightly less than Earth's

 


Mercury Facts || Earth-based Views || A Day On Mercury
Surface Of Mercury || Mariner 10 Encounters

Mercury Home

1998 National Air and Space Museum