API VERSION: 1.2
API SOURCE: NASA/JPL Horizons API

*******************************************************************************
 Revised: Sep 01, 2026      Euclid Observatory (spacecraft)                -680
             https://www.esa.int/Science_Exploration/Space_Science/Euclid

 BACKGROUND:
  Euclid was built and operated by the European Space Agency with contributions
  from NASA. It launched July 01, 2023 @ 15:12 UTC on a SpaceX Falcon 9 from 
  Cape Canaveral, Florida, USA.

  After a one-month transit, its operational orbit will halo around the 
  Earth-Sun Lagrange point 2 (L2), at an average distance of 1.5 million km 
  from Earth.  This location keeps pace with Earth as it orbits the Sun 
  (and also hosts ESA's Gaia and NASA's James Webb space telescopes, among 
  others).

  Nominal mission lifetime is six years, with the possibility of extension 
  (limited by the amount of cold gas used for propulsion).

 MISSION:
  Euclid is a cosmology survey mission, optimised to determine the properties 
  of dark energy and dark matter on universal scales to address key questions:

   - What is the structure and history of the cosmic web?
   - What is the nature of dark matter?
   - How has the expansion of the Universe changed over time?
   - What is the nature of dark energy?
   - Is our understanding of gravity complete?

  In addition, Euclid will perform near-infrared spectroscopy of hundreds of 
  millions of galaxies and stars. This will allow investigation of the 
  chemical and kinematical properties of many targets in detail.

  Euclid's image quality will be at least four times sharper than that 
  achieved by ground-based sky surveys.
 
 SPACECRAFT: 
  4.7m tall, 3.7 m diameter
  Two major components: service and payload modules

  Service module                    850 kg
  Payload module                    800 kg
  Propellant                        210 kg
  Balancing mass                     40 kg

  Service module contains:
   electric power generation and distribution
   attitude control
   data processing electronics
   propulsion
   telecommand and telemetry
   thermal control

 SCIENCE INSTRUMENTS (payload module):
  - 1.2-m diameter telescope
  - Visible-wavelength camera (the VISible instrument, VIS) 
  - Near-Infrared Spectrometer and Photometer, NISP)

 SPACECRAFT TRAJECTORY 
  Tracking-data based through 2026-Aug-31, predicts from ESA thereafter:

  Trajectory name                                    Start         Stop
  --------------------------------------------    -----------   -----------
  euclid_flp_00081_20230701_20311005_v01          2023-Jul-01   2031-Oct-05 
*******************************************************************************

Input ELEV_CUT must be between -90.0 <= e <= 90.0 degrees -- try again