EarthNeptuneJupiterPSR B1620-26 b

Diagram, not a photograph. Sizes to scale; distance from the star on a logarithmic scale, worked out from the orbital period and the star’s mass. The planet’s colour shows its equilibrium temperature (not measured), not its real colour. Source: NASA Exoplanet Archive.

Confirmed exoplanet · Database record + computed analysis

PSR B1620-26 b

A confirmed world orbiting PSR B1620-26.

Discovered 2003 · Pulsar Timing

A gas giant

13.30 Earth radii, Jupiter-class (Jupiter is 11.2). At only 794.6 Earth masses for that size, it must be substantially gas or volatile ices: puffy, not rocky.

Its sun

The system holds 2 stars, so its skies have more than one sun.

How we found it

It was found by pulsar timing: irregularities in a dead star's metronome-precise radio pulses. Planets around pulsars either survived a supernova or formed from its wreckage. The discovery was announced in 2003 from Hubble Space Telescope.

Everything above is computed from the archive’s measured values for this planet. Where a quantity is missing, the statement is omitted rather than guessed.

About this record

The measured values come from the NASA Exoplanet Archive, and any missing value has not been determined yet; the Atlas never fills gaps with guesses. More standout worlds: Proxima b, TRAPPIST-1e, K2-18 b, 55 Cancri e, and the detection methods that found them all.