---
title: "KOINTREAU-1 b"
url: "https://spacecatalog.org/object/kointreau-1-b"
release: "DR1"
licence: "No licence stated; acknowledgement requested"
citation: "SpaceCatalog. KOINTREAU-1 b [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/kointreau-1-b"
---

# KOINTREAU-1 b

KOINTREAU-1 b is a gas giant in the constellation [Taurus](https://spacecatalog.org/constellation/taurus), 517.3 ly from Earth. It orbits XEST 17-036 at a mean distance of 690 AU. It has a mass of 10.60 M♃ and an estimated radius of 1.11 R♃ · 79 088 km. The radius is an estimate from the mass rather than a measurement. Other catalogues list it as XEST 17-036. It was discovered in 2026.

## At a glance

- **WHAT IT IS:** Gas giant
- **HOW FAR:** 517.3 ly — The light arriving now left it that long ago.
- **HOW BIG:** 1.11 R♃ · 79 088 km — Its radius: half the width across.
- **WHERE TO LOOK:** [Taurus](https://spacecatalog.org/constellation/taurus) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Gas giant |
| MASS | 10.60 M♃ +2.5 / −2.3 |
| RADIUS | 1.11 R♃ · 79 088 km — estimated from the mass, not measured |
| DISTANCE FROM EARTH | 517.3 ly +14 / −13 — by NASA Exoplanet Archive sy\_dist (TICv8, 2019AJ....158..138S) |
| ORBITS | XEST 17-036 |
| SEMI-MAJOR AXIS | 690 AU ±10 |
| CONSTELLATION | Taurus |
| RIGHT ASCENSION (J2000) | 04h 33m 26.2s |
| DECLINATION (J2000) | +22° 45′ 29.0″ |
| DISCOVERED | 2026 |

## 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 spectral type | M4 |
| Host star temperature | 3551 ±59 K |
| Host star mass | 0.26 ±0.03 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 | XEST 17-036 |
| Stars in system | 1 |
| Planets in system | 1 |

### WHEN IT WAS FOUND

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

| Field | Value |
| --- | --- |
| Discovery method | Imaging |
| Discovered at | W. M. Keck Observatory |

## Also known as

- Exoplanet: KOINTREAU-1 b
- Host star: XEST 17-036

## 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. KOINTREAU-1 b \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/kointreau-1-b

```bibtex
@misc{spacecatalog_kointreau-1-b,
  author       = {{SpaceCatalog}},
  title        = {{KOINTREAU-1 b}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/kointreau-1-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/kointreau-1-b