Mission characteristics

Organisation: ESA
Mission type: M-class
Primary science objective: Cosmology and fundamental physics: understand the properties and nature of dark energy
Launch date: 2022
Orbit: Second Sun-Earth Lagrangian point (L2) – Halo orbit
Mission lifetime: 6.25 years
Total mass: 2,200 kg
Payload mass: 855 kg
Size: 4.5 m long, 3.1m diameter
Telescope: 3-mirror anastigmatic Korsch telescope. Entrance pupil of primary mirror: 1.20. Silicon Carbide mirror
Focal length: 24.5m
Wavelength coverage: Visible (550-900 nm) and near infrared (900-2000nm)
Telemetry: 855 Gbit/day, data transfer in 4hrs daily slot in K band (25.5-27.0 Ghz)
Observing mode: Step and stare, exposure time up to 4500 sec/field
Launcher: ESA/AE: Soyuz-Fregat
Launch site: ESA/CSG: Kourou spaceport
Spacecraft and Service Module: Thales Alenia Space
Payload Module, telescope: Airbus (Defence and Space)
Instruments: Visible imager (VIS) and Near Infrared Spectrometer and Photometer (NISP) Euclid Consortium
Pixel size: 0.1 arcsecond for VIS; 0.3 arcsecond for NISP
Common VIS and NISP Field of View: 0.53 deg2
Filters: Very broad band (R+I+Z) for VIS; broad band Y, J and H for NISP
Grism spectral coverage: 1 “Blue” grism (920 nm – 1250 nm) , 3 “Red” grisms (1250 nm – 1850 nm; 3 different orientations)
Grism spectral resolution: 380 for a 0.5 arcsecond source (stiltess spectroscopy)
Visible CCD detectors: 36 (6×6), 4096×4132 pixels each. ESA/e2v,
Near infrared detectors: 16 (4×4), 2040×2040 pixels each. ESA/NASA/H2GR from Teledyne TIS
Wide Survey 15,000 deg2, excluding galactic and ecliptic planes,

Limiting magnitudes: ABVIS =24.5 (10-sigma, extended); AB Y,J,H=24.0 (5-sigma, point-like)

Deep Survey 40 deg2, 3 different fields, selection of field location completed,

Limiting magnitudes: ABVIS=26.5 (10-sigma, extended) ; ABY,J,H=26.0 (5-sigma, point-like)

Main cosmological probes Weak lensing (morphometry/distortion of galaxies); Galaxy Clustering (spectroscopy/redshift of galaxies)
Operation: ESOC
Ground Segment: ESAC and Euclid Consortium

Last update : Jun 01, 2019