SE-OP at a Glance
Space metrology
The Space Service of the Paris Observatory (SE-OP) is responsible for developing and disseminating ephemerides of Solar System objects and calendars, and is the official public source of ephemerides at the national level.
The SE-OP team implements research and related technologies in order to offer high-quality services accessible to public and private actors, as well as citizens.
- +340 years of expertise
- +1.5 million celestial bodies
- 5 observation facilities
- +40 products and services
Products and Services
SE-OP offers a wide range of products and services dedicated to ephemerides.
Web Forms
Easily calculate the ephemerides of over 1.5 million bodies of the Solar System and access forecasts of celestial phenomena.
VO Solar System Portal
Set of interoperable services, tools and data dedicated to the dynamics and physics of planetary systems.
INPOP
Orbital solutions for the Sun, planets, Pluto and the Moon developed by the SE-OP.
IERS Bulletins
Find time series of Earth Orientation Parameters (EOP) as well as IERS bulletins B, C and D.
Official Publications
Discover our publications dedicated to ephemerides such as Connaissance des temps.
Requests
Please do not hesitate to contact us with any queries regarding ephemerides, celestial phenomena and calendars.
