Kuiper Belt outer orbit
The Kuiper Belt is a region of the Solar System beyond Neptune containing many icy bodies and dwarf planets.
How big is it?
50 AU away
Distance · rounded reference
A little perspective
About 1.66 times the distance of Neptune’s orbital distance.
Neptune’s orbital distance: Neptune’s orbital distance is the average separation between Neptune and the Sun.
Measurements, assumptions & sources +
Kuiper Belt outer orbit
A rounded 50 AU distance from the Sun for the classical belt’s outer region. There is no sharp universal edge. The illustration is a boundary diagram; dots identify objects or regions and do not depict their physical diameters.
Defined examples — our methodology
The marked distance is calibrated. Unmeasured illustration details are representative.
Neptune’s orbital distance
A rounded 30.11 AU semi-major-axis reference, not today’s distance.
Defined examples — our methodology
The marked distance is calibrated. Unmeasured illustration details are representative.
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Why this measurement?
Why we use 50 AU
For comparison, this page uses distance. This is labelled rounded reference: an explicit comparison model rather than a claim that every example has the same value.
A rounded 50 AU distance from the Sun for the classical belt’s outer region. There is no sharp universal edge. The illustration is a boundary diagram; dots identify objects or regions and do not depict their physical diameters.
The marked horizontal span follows the named feature; transparent margins and unmeasured details do not alter it. How calibrated comparisons work →
Recorded properties
Kuiper Belt outer orbit dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 50 AU | Not recorded | rounded reference |
Around this scale
Go smaller. Go bigger.
These links use compatible length records, ordered around the selected value.
Nearest lower value · SpaceNeptune’s orbital distance30.11 AUNeptune’s orbital distance is the average separation between Neptune and the Sun.
Nearest higher value · SpacePlanetary Solar System60.22 AUThe Solar System is the collection of the Sun and all objects gravitationally bound to it, including planets, moons, and smaller bodies.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
There’s always another scale
Follow your curiosity.
SpaceEarth–Sun distance1 AUThe Earth–Sun distance, or astronomical unit, is the standard measure of separation between Earth and the Sun used in astronomy.
SpaceMilky Way30.66 kpcThe Milky Way is a spiral galaxy containing hundreds of billions of stars, including our Solar System.
SpaceObservable universe28.21 GpcThe observable universe is the region from which light or other signals have had time to reach us since the early universe.SpaceNeptune’s orbital distance30.11 AUNeptune’s orbital distance is the average separation between Neptune and the Sun.SpacePlanetary Solar System60.22 AUThe Solar System is the collection of the Sun and all objects gravitationally bound to it, including planets, moons, and smaller bodies.
SpaceBetelgeuse6.511 AUBetelgeuse is a red supergiant star in the constellation Orion that changes in brightness over time.SpaceRed giant0.465 AUA red giant is a star that has expanded and cooled after exhausting the hydrogen in its core.
SpaceSirius A2,379,000 kmSirius A is the brighter main-sequence star in the Sirius binary system.