# Exosatellite discovery around brown dwarf

> Live situation record from CLSTR: https://clstr.news/situations/exosatellite-discovery-around-brown-dwarf
> Updated: 2026-07-31T14:10:50.000Z. Sources: 6. Developments: 2.

Astronomers announced the detection of an unusual planetary system about 71–72 light‑years from Earth. The system features a red dwarf star, a brown dwarf in orbit, and a Jupiter‑mass object that circles the brown dwarf rather than the star. The initial report, published on 25 July 2026, introduced the provisional term “exosatellite” to describe this object, noting that it does not fit traditional categories of planets or moons.

A follow‑up report on 31 July 2026 provided additional details, identifying the system as CD‑35 2722 and confirming the object's mass and orbital parameters through radial‑velocity measurements with the VLT’s CRIRES+ spectrograph. The same research team, led by Kevin Hoy, emphasized that the discovery represents a possible first exosatellite (or exomoon) beyond the Solar System and may guide future searches for similar bodies.

## Timeline

### 2026-07-31: Exosatellite Discovery Around Brown Dwarf in CD-35 2722 System

Astronomers using ESO's VLT have identified a Jupiter‑mass exosatellite orbiting a brown dwarf in the CD‑35 2722 system, a potential first moon beyond the Solar System.

4 sources. https://clstr.news/cluster/possible-first-exomoon-detected-around-brown-dwarf-in-cd35-2722-system

### 2026-07-25: Exosatellite system 71 ly away forces new planetary classification

A 71‑light‑year‑distant system with a red dwarf, brown dwarf and Jupiter‑mass exosatellite challenges planetary classification, prompting the term “exosatellite.”

2 sources. https://clstr.news/cluster/exosatellite-system-71-ly-away-forces-new-planetary-classification

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Cite as: Exosatellite discovery around brown dwarf. CLSTR, https://clstr.news/situations/exosatellite-discovery-around-brown-dwarf