Gas giant · 2MASS J16262785-2625152

KOINTREAU-4 b

ExoplanetsDiscovered 2026

Scientific overview

KOINTREAU-4 b is a gas giant orbiting 2MASS J16262785-2625152, about 474 light-years from Earth. It was discovered in 2026 using the direct imaging.

Host star

2MASS J16262785-2625152

Spectral type

M4.5

Temperature

3,252 K

Discovery and detection

Detection method

Discovery year

2026

W. M. Keck Observatory

Knowledge connections

Orbits2MASS J16262785-2625152
Discovered by methodDirect Imaging
Discovered atW. M. Keck Observatory
Catalogued inNASA Exoplanet Archive

Quick facts

Class: Gas giant
Host star: 2MASS J16262785-2625152
Discovery method: Direct Imaging
Discovery year: 2026
Semi-major axis: 182 AU
Radius: 12.2 R⊕
Mass: 4862.77 M⊕
Density: 14.76 g/cm³ · derived
Distance: 474 ly

Density is derived from the archive mass and radius via ρ = M / (4⁄3·π·r³); all other values are catalogued measurements.

Derived values

Computed from source-backed inputs via standard formulae — not observations. Every input and constant is traced below.

Bulk density14.76 g/cm³derived
Formula & inputs
Formula: ρ = M / (4⁄3·π·r³) (v1.0.0, impl v1.0.0)
Inputs:
- massEarth = 4862.77 M⊕ · NASA
- radiusEarth = 12.2 R⊕ · NASA
Assumptions: M⊕ = 5.972e+24 kg, R⊕ = 6371000 m (IAU 2015 B3 nominal); Assumes a uniform sphere.
Limitations: Withheld above 30 g/cm³ (inconsistent mass/radius inputs).; Archive mass/radius carry no propagated uncertainty here.
Uncertainty: not propagated (inputs carry no catalogued uncertainty)
Computed as of 2026-06-29.

Quality & authority

Partial

Unreviewed

Description: Complete
Source coverage: Partial
Relationship coverage: Complete
Review coverage: None
Citation coverage: None
Image coverage: Not applicable

Data from the NASA Exoplanet Archive. See source quality.