Map of the Universe
Ritona
Asteroid · Classical Kuiper belt object
About Ritona
On 2026-01-01, the date the map shows, Ritona was 40.6 AU from the Sun; sunlight takes 5.63 hours to reach it.
It goes round the Sun once every 267.3 years, at an average distance of 41.498 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 | 41.498 AU |
| Orbital period | 267.3 years |
| Eccentricity | 0.0226 |
| Inclination | 19.28° |
| Absolute magnitude (H) | 3.69 |
| Diameter | ≈ 768 km (estimated from brightness) |
| Distance from the Sun | 40.6 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
145452 Ritona (provisional designation 2005 RN43) is a large trans-Neptunian object orbiting the Sun in the Kuiper belt. It was discovered on 10 September 2005 by astronomers Andrew Becker, Andrew Puckett and Jeremy Kubica at Apache Point Observatory in Sunspot, New Mexico.
Excerpt from the Wikipedia article 145452 Ritona, licensed CC BY-SA 4.0.