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NASA/JPL-Caltech spacecraft

2001 Mars Odyssey

Also mars odyssey · 2001 mars odyssey

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Active mission (science.nasa.gov, page updated 2026-06-22) — the longest-serving spacecraft at another planet. NASA put its remaining propellant at about 4 kg in 2023.

At Mars.

Measured

Agency
NASA/JPL-Caltech
Arrived
2001-10-24
From the Earth today
1.31 AU (196 million km)
From Mars's centre
3,817 km
Bus width
2.6 m

How far, from the Earth

1.31 AU. To cross it:

  • Light11 minutes
  • Voyager 1's speed4.41 months
  • Driving at 100 km/h223 years

Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.

Facts

  • JPL Horizons trajectory round Mars: worst miss 21 km on the dates it was checked against (median 9 km); between those dates as much as about 64 km. Dates after the data was fetched are Horizons' predictions, which it revises as a mission flies.

Where this comes from

  • NASA/JPL-Caltech
  • Spacecraft trajectories: JPL Horizons, NASA/JPL-Caltech; each mission's agency credited on its card.
  • 3D model: 2001 Mars Odyssey model: NASA 3D Resources

Every catalogue Ouranos draws is credited on the credits page.