---
title: "The GJ 3512 system"
url: "https://spacecatalog.org/system/gliese-gj-3512"
release: "DR1"
licence: "No licence stated; acknowledgement requested"
citation: "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 GJ 3512 system

GJ 3512 is an M red star in Ursa Major, 32.55 ly away, with 2 known planets. Their orbits run from 0.338 to 1.73 AU. All of them were detected by radial velocity.

## The planets, innermost first

| Planet | Orbit (AU) | Period | Radius | Mass | Equilibrium T |
| --- | --- | --- | --- | --- | --- |
| [b](https://spacecatalog.org/object/gj-3512-b) | 0.338 | 203.1 d | 14.30 R⊕ | 147 M⊕ | 97 K |
| [c](https://spacecatalog.org/object/gj-3512-c) | 1.73 | 6.445 yr | 14.30 R⊕ | 144 M⊕ | 43 K |

Every figure is the planet's composite parameter from the [NASA Exoplanet Archive (Planetary Systems Composite Parameters)](https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars), one consistent set per world. Semi-major axes are orbits about the star, not distances from Earth.

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 host star

| Quantity | Value |
| --- | --- |
| CLASS | M red star |
| SPECTRAL TYPE | m |
| LUMINOSITY | 0.000712 L☉ |
| DISTANCE FROM EARTH | 32.55 ly |
| APPARENT MAGNITUDE | 15.05 |
| CONSTELLATION | Ursa Major |

The star itself: https://spacecatalog.org/object/gliese-gj-3512

The page itself, with the orbits drawn: https://spacecatalog.org/system/gliese-gj-3512