---
title: "The Lalande 21185 system"
url: "https://spacecatalog.org/system/lalande-21185"
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 Lalande 21185 system

Lalande 21185 is an M2+V red star in Ursa Major, 8.307 ly away, with 2 known planets. Their orbits run from 0.0788 to 2.94 AU. All of them were detected by radial velocity.

## The planets, innermost first

| Planet | Orbit (AU) | Period | Radius | Mass | Equilibrium T |
| --- | --- | --- | --- | --- | --- |
| [GJ 411 b](https://spacecatalog.org/object/gj-411-b) | 0.0788 | 12.94 d | 1.45 R⊕ | 2.69 M⊕ | 350 K |
| [HD 95735 c](https://spacecatalog.org/object/hd-95735-c) | 2.94 | 8.066 yr | 3.76 R⊕ | 13.6 M⊕ | 63 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 | M2+V red star |
| SPECTRAL TYPE | M2+V |
| RADIUS | 0.417 R☉ |
| SURFACE TEMPERATURE | 3511 K |
| LUMINOSITY | 0.0057 L☉ |
| DISTANCE FROM EARTH | 8.307 ly |
| APPARENT MAGNITUDE | 7.49 |
| CONSTELLATION | Ursa Major |

The star itself: https://spacecatalog.org/object/lalande-21185

The page itself, with the orbits drawn: https://spacecatalog.org/system/lalande-21185