2
$\begingroup$

Platforms like NASA's JPL HORIZONS web-interface for solar system dynamics often have obtainable parameters like sub-solar or sub-terrestrial longitude for a given time and celestial object. (example: Mars)

Where is this longitude measured from? Is there a widely accepted standard?

$\endgroup$
2
$\begingroup$

Mars's prime meridian was set in 1972 as the center line of the crater Airy-0, which is at S5.1 E0.0.

(https://mars.jpl.nasa.gov/mgs/msss/camera/images/01_31_01_releases/airy0/)

$\endgroup$
  • $\begingroup$ A reference would be nice. Even the Moon has two competing body-fixed reference frames, both widely used. $\endgroup$ – David Hammen Jul 4 at 4:48

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.