04 / Ephemeris live
Prepare a surface ephemeris
Choose lunar surface coordinates and a date, then open a direct Sun observer query from JPL Horizons.
Lunar surface observer · geodetic
Opens JPL directly in a separate tab with a 24-hour airless observer query. The site does not embed or proxy Horizons results.
What this view does not claim
No terrain-horizon shadow cast or uninterrupted sunlight estimate.
No communications link budget, relay schedule, or terrain-occlusion solution.
No calculated landing score or slope threshold; use the cited site DEM products.
JPL’s published API policy prohibits embedding its APIs in websites and asks clients to avoid redundant requests. This navigator follows that policy by sending users to the official JPL service instead of querying it in the background. JPL API usage policy