Shop Windows to the Universe

Dig into Montana Before History: 11K Years of Hunter-Gatherers in the Rockies and Plains by D. H. MacDonald, Ph.D. See our online store book collection.

Mercury Statistics

Planetary Symbol: Name in Roman/Greek Mythology: Mercury/Hermes
Diameter: 4,878 km (3,030 miles) Rotation Period about Axis: 58.65 days
Mass: 0.33x10^24 kilograms (0.06 x Earth's) Revolution Period about the Sun: 0.24 years
Density: 5,427 kg/m^3 Tilt of Axis: 0o
Minimum Distance from Sun: 46.0 million km
(28.6 million miles)
Surface Gravity: 3.7 m/s^2 (0.38 x Earth's)
Maximum Distance from Sun: 69.8 million km
(43.4 million miles)
Temperature Range on Mercury: -184o C to 427o C
(-300o F to 800o F)
Orbital Semimajor Axis: 0.387 AU (Earth=1 AU) Average Surface Temperature (K): 440K
Minimum Distance from Earth: 77.3 million km
(48.0 million miles)
Satellites: 0

Mercury Image Archive

Comparative Planetary Statistics -- in table form

Comparative Orbital Statistics -- in table form

Actual Distance to Earth

Last modified March 5, 2003 by Randy Russell.

Shop Windows to the Universe Science Store!

Our online store includes issues of NESTA's quarterly journal, The Earth Scientist, full of classroom activities on different topics in Earth and space science, as well as books on science education!

Windows to the Universe Community

News

Opportunities

You might also be interested in:

Cool It! Game

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

Atmosphere of Mercury

Mercury has almost no atmosphere. The planet's small size means that its gravity is too weak to hold down a normal atmosphere. There is a very thin atmosphere around the planet. Mercury's thin atmosphere...more

Mercury's Poles

Some planets are tilted so their North and South Poles are not straight up and down. Earth is tilted a bit - about 23. Uranus is tilted a lot - more than 90. Mercury, on the other hand, is hardly tilted...more

The Magnetic Poles of Mercury

Mercury has a magnetic field. Its field is weak. Earth's magnetic field is tilted, and so is Mercury's. That means Mercury's magnetic poles are not in the same place as its geographic poles. Mercury has...more

Magnetosphere of Mercury

Mercury is the only inner planet other than the Earth that has a significant magnetic field (220 nT). This field, along with the planet's high density and small size relative to the Earth, indicates that...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF