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1 known planet · 20,548 light years

UKIRT-2017-BLG-001L

UKIRT-2017-BLG-001L is a star 20,548 light years away, with 1 confirmed planet. Distances and orbital speeds are to scale; the star and planets are enlarged so you can see them.

Day 0
habitable zone (estimate)planet orbits

Green band: where liquid water could exist on a planet's surface. Drag to turn the system, pinch or scroll to zoom.

The star

The star

UKIRT-2017-BLG-001L

Type
star
Mass
0.81 × the Sun

The planets

UKIRT-2017-BLG-001L

UKIRT-2017-BLG-001L b

Year
9.5 years
Distance from star
4.18 AU
Mass
1.3 Jupiters
Size
14 × Earth
Found
2018, microlensing (Mauna Kea Observatory)
Outside the habitable zone

Masses found by the wobble method are minimums, because the orbit's tilt is unknown. Temperatures are equilibrium estimates for a bare planet, before any atmosphere.

How we know

A lens in space

The system briefly magnified a more distant star; a planet left its own small blip in the brightening.

Sources

  1. Planet and star parameters: NASA Exoplanet Archive, Planetary Systems Composite Parameters, retrieved 1 Nov 2026. This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.
  2. Position: HYG Database v4.1 (CC BY-SA 4.0).
  3. Habitable zone: a simple estimate from the star's brightness (√L × 0.95 to 1.67 AU), shown as a guide.
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