Map of the Universe
Uni
Asteroid · Classical Kuiper belt object
About Uni
On 2026-01-01, the date the map shows, Uni was 39.5 AU from the Sun; sunlight takes 5.48 hours to reach it.
It goes round the Sun once every 281.2 years, at an average distance of 42.925 AU.
The map lists it as an asteroid (trans-Neptunian object) and shows it in the Solar System part of the map, drawn on the plane of Earth’s orbit (the ecliptic).
Key numbers
| Class | Trans-Neptunian object |
|---|---|
| Semi-major axis | 42.925 AU |
| Orbital period | 281.2 years |
| Eccentricity | 0.1462 |
| Inclination | 19.42° |
| Absolute magnitude (H) | 3.83 |
| Diameter | ≈ 720 km (estimated from brightness) |
| Distance from the Sun | 39.5 AU |
Where it is
Its place in the universe, from the inside out: Solar System › Orion–Cygnus Arm (Local Arm) › Milky Way › Local Group › Virgo Supercluster › Laniakea Supercluster › Observable universe.
Zoom out to see it in context: Neptune and the Kuiper belt, a view about 110 AU across.
From Wikipedia
55637 Uni (provisional designation 2002 UX25) is a large trans-Neptunian object that orbits the Sun in the Kuiper belt beyond Neptune. It briefly garnered scientific attention when it was found to have an unexpectedly low density of about 0.80 g/cm3, though recent occultations indicate a higher density for the object.
Excerpt from the Wikipedia article 55637 Uni, licensed CC BY-SA 4.0.