---
title: "PSR B1620-26 b"
url: "https://spacecatalog.org/object/psr-b1620-26-b"
release: "DR1"
licence: "No licence stated; acknowledgement requested"
citation: "SpaceCatalog. PSR B1620-26 b [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/psr-b1620-26-b"
---

# PSR B1620-26 b

PSR B1620-26 b is a gas giant in the constellation [Scorpius](https://spacecatalog.org/constellation/scorpius). It orbits PSR B1620-26 at a mean distance of 23 AU. It has a mass of 2.50 M♃ and a radius of 1.19 R♃ · 84 829 km. It was discovered in 2003.

## At a glance

- **WHAT IT IS:** Gas giant
- **HOW FAR:** 23 AU — Its average distance from PSR B1620-26, not from Earth.
- **HOW BIG:** 1.19 R♃ · 84 829 km — Its radius: half the width across.
- **WHERE TO LOOK:** [Scorpius](https://spacecatalog.org/constellation/scorpius) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Gas giant |
| MASS | 2.50 M♃ ±1 |
| RADIUS | 1.19 R♃ · 84 829 km |
| ORBITS | PSR B1620-26 |
| SEMI-MAJOR AXIS | 23 AU |
| CONSTELLATION | Scorpius |
| RIGHT ASCENSION (J2000) | 16h 23m 38.2s |
| DECLINATION (J2000) | −26° 31′ 53.7″ |
| DISCOVERED | 2003 |

## Catalogue data

### WHAT KIND OF THING IT IS

What the object is in itself, rather than how it happens to look from here.

| Field | Value |
| --- | --- |
| Host star mass | 1.35 M☉ |

### THE ORBIT

The shape of the path, where the object sits on it, and the instant those figures were true of. An orbit is a fit to observations and drifts away from the real one either side of its epoch.

| Field | Value |
| --- | --- |
| Host star | PSR B1620-26 |
| Stars in system | 2 |
| Planets in system | 1 |

### WHEN IT WAS FOUND

Who first saw it, from where, and by what method.

| Field | Value |
| --- | --- |
| Discovery method | Pulsar Timing |
| Discovered at | Hubble Space Telescope |

## Also known as

- Exoplanet: PSR B1620-26 b
- Host star: PSR B1620-26

## Source

[NASA Exoplanet Archive (Planetary Systems Composite Parameters)](https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars) — No licence stated; acknowledgement requested

The producer asks: This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Cite Christiansen et al. (2025), Planetary Science Journal (doi:10.3847/PSJ/ade3c2), and the literature reference given with each value.

How this was made: https://spacecatalog.org/methods#source-exoplanet-archive

## Cite this page

SpaceCatalog. PSR B1620-26 b \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/psr-b1620-26-b

```bibtex
@misc{spacecatalog_psr-b1620-26-b,
  author       = {{SpaceCatalog}},
  title        = {{PSR B1620-26 b}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/psr-b1620-26-b},
  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from NASA Exoplanet Archive (Planetary Systems Composite Parameters).}
}
```

NASA Exoplanet Archive (Planetary Systems Composite Parameters) — No licence stated; acknowledgement requested

Acknowledgement the producer asks for: This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Cite Christiansen et al. (2025), Planetary Science Journal (doi:10.3847/PSJ/ade3c2), and the literature reference given with each value.

The page itself, with its pictures, the sky map and the observing tools: https://spacecatalog.org/object/psr-b1620-26-b