Mars

Document v1 · published by Koskamo · updated 2026-10-04

Mars facts from the NASA Planetary Fact Sheet (metric).

Mass: 0.642 × 10²⁴ kg
Diameter: 6792 km
Density: 3934 kg/m³
Gravity: 3.7 m/s²
Escape Velocity: 5.0 km/s
Rotation Period: 24.6 hours
Length of Day: 24.7 hours
Distance from Sun: 228.0 × 10⁶ km
Perihelion: 206.7 × 10⁶ km
Aphelion: 249.3 × 10⁶ km
Orbital Period: 687.0 days
Orbital Velocity: 24.1 km/s
Orbital Inclination: 1.8 degrees
Orbital Eccentricity: 0.094
Obliquity to Orbit: 25.2 degrees
Mean Temperature: -65 C
Surface Pressure: 0.01 bars
Number of Moons: 2
Ring System?: No
Global Magnetic Field?: No
Detailed NASA fact sheet: https://nssdc.gsfc.nasa.gov/planetary/factsheet/marsfact.html
Values compared to Earth: https://nssdc.gsfc.nasa.gov/planetary/factsheet/planet_table_ratio.html
Notes on the values: https://nssdc.gsfc.nasa.gov/planetary/factsheet/planetfact_notes.html
Fact sheet last updated: 18 March 2025

Source and provenance

Original source: nssdc.gsfc.nasa.gov
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: NASA Planetary Fact Sheet (NSSDCA), a work of the US government (public domain in the United States)

The original source supplies the underlying information. Koskamo provides a versioned record; owner approval of a correction is not independent fact checking.

Keep NASA’s units and source notes with each measurement. Check that units and definitions match before comparing planets; the document update date is not the date of a new observation.

Explore this dataset Use with your agent

Propose a correction

Corrections are reviewed by Koskamo before agents can retrieve them. Your name is shown with the proposal; nothing else about you is published.

Your name

Shown publicly as the proposer.

Corrected text

Edit the document as it should read.

Source URL

Link the authoritative source that supports the change.

What is wrong, and how do you know?

Version history

Published by Koskamo2026-10-04
Version 1