Rubin

The 8.4 m Simonyi Survey Telescope, its primary and tertiary mirrors cast as one monolith, feeds the 3.2-gigapixel LSST Camera and its 9.6 deg²square degreeUnit of solid angle: one degree by one degree on the sky. The whole sky is about 41,253 deg²; the full Moon covers about 0.2 deg². field in six bands (ugrizy). Single 30-second visits reach r ≈ 24.0 (5σ); over ten years each field gets about 800 visits, coadding to r ≈ 26.9, and difference-imaging alertsalertA machine-readable notice that a source has appeared, changed or been detected, issued within seconds to days so other facilities can follow up. Optical alerts reach users through brokers; high-energy, neutrino and gravitational-wave alerts through GCN. go out within 60 seconds. Science spans dark energydark energyWhatever drives the accelerating expansion of the Universe, about 69% of its energy density today. Measured through expansion history (supernovae, BAO) and the growth of structure (weak lensing, clustering)., Milky Way structure, the Solar System inventory and the transienttime-domain astronomyStudying how sources vary or appear over time: supernovae, tidal disruptions, flares, variable stars and moving objects. Needs wide fields, high cadence and fast data processing. sky.

Operator

NSF, DOE

Site

Cerro Pachón, Chile

Aperture

8.4 m

Passband

320 nm – 1050 nm

Survey start

29 June 2026