Roman Space Telescope Tracker

The Nancy Grace Roman Space Telescope is NASA's newest flagship observatory, launched on 30 August 2026 at 11:26 UTC aboard a SpaceX Falcon Heavy from Launch Complex 39A at Kennedy Space Center. It pairs a 2.4-metre mirror, the same diameter as Hubble's, with a 300.8-megapixel camera whose field of view is roughly 100 times larger than Hubble's infrared view. The result is a survey machine: Hubble's sharpness applied to enormous areas of sky, around 1,000 times faster than Hubble could cover them.

The Journey to L2

Roman is currently cruising to the Sun–Earth L2 Lagrange point, about 1.5 million kilometres from Earth in the anti-sunward direction, nearly four times farther than the Moon. The transfer takes roughly 100 days, with L2 orbit insertion planned for early December 2026. Along the way the observatory has already deployed its solar arrays, high-gain antenna and aperture cover, completed its first course-correction burns, and powered on both science instruments for checkout. The tracker at the top of this page follows the cruise in real time: distance from Earth, percentage of the journey complete and the live countdown to arrival.

Why L2?

L2 is the premier address for deep-sky infrared astronomy, and Roman is joining a distinguished neighbourhood: JWST and ESA's Euclid both operate there. Orbiting L2 lets a telescope keep the Sun, Earth and Moon all in roughly the same direction, so a single shield can block their heat and light while the sky stays continuously observable. The thermal stability matters enormously for Roman's precision photometry, and the unobstructed view suits its long, repeated survey campaigns. Unlike Hubble in low Earth orbit, Roman will never have Earth blocking half its sky.

A Different Kind of Flagship

Where JWST stares deeply at individual targets, Roman is built for breadth. Its Wide Field Instrument will image billions of galaxies over the 5-year primary mission, measure the shapes of hundreds of millions of them for dark-matter mapping, and discover thousands of Type Ia supernovae to trace the accelerating expansion of the universe, the phenomenon we call dark energy. Toward the centre of the Milky Way, its microlensing survey is expected to complete the exoplanet census that transit missions started, adding tens of thousands of new worlds including cold, distant planets no other technique can find. The Coronagraph Instrument rounds out the mission as a technology demonstration, using deformable mirrors to suppress starlight to part-per-billion levels and directly image mature giant exoplanets.

Who Was Nancy Grace Roman?

Nancy Grace Roman (1925–2018) was NASA's first Chief of Astronomy and the person most responsible for the existence of space telescopes as a field. In the 1960s and 70s she championed, planned and defended what became the Hubble Space Telescope, earning her the nickname "the Mother of Hubble". Naming NASA's wide-field successor after her closes a neat historical loop: the telescope that carries her name shares Hubble's mirror diameter while seeing 100 times more sky at once.

Open Data from Day One

Roman operates with no exclusive-access period: every observation becomes public as soon as it is processed. That policy means discoveries can come from anyone, anywhere, from day one of survey operations, and it makes Roman's archive one of the most significant public datasets in astronomy from the moment first light is declared.

Tracking Roman

This tracker computes Roman's position in real time from precision deep-space ephemeris solutions (see our data sources). Deep-space trajectories cannot be tracked with the TLE data and SGP4 propagation used for satellites in Earth orbit; they require ephemeris solutions based on the full gravitational model of the Sun–Earth–Moon system. Orbital Radar interpolates between hourly ephemeris points to stream Roman's live distance, sky position and journey progress, updated every 10 seconds. Roman also appears on the Deep Space Tracker, a live 3D solar-system map of 25+ missions, alongside JWST and Euclid at L2.

Once science operations begin in 2027, this page will also show what Roman is observing, and released images will flow automatically into the gallery above. For more live tracking, see the JWST Tracker, the Hubble Tracker or all live satellite trackers on Orbital Radar. For the orbital mechanics behind L2 halo orbits, visit the space glossary or the Orbital Academy.