31 Euphrosyne
A main-belt asteroid about 267 km across, 3.2 AU out and 5.6 years to a lap of the Sun.
Where it is right now
31 Euphrosyne is in Ara, 3.11 AU away, magnitude 12.9.
Computed for 2 August 2026, 17:00 UTC, and recomputed at least hourly. This page is cached, so treat the line above as accurate to the hour rather than to the second. The map shows the live position.
Position from a Kepler propagation of the published elements below, accurate to about an arcminute.
Facts
Every line carries the source it came from.
- Diameter
- 267 kmSource: NASA/JPL Small-Body Database
- Orbital period
- 5.6 yearsSource: NASA/JPL Small-Body Database
- Distance from the Sun
- 3.162 AU on averageSource: NASA/JPL Small-Body Database
- Orbit shape
- eccentricity 0.216, inclined 26.3 degrees to the eclipticSource: NASA/JPL Small-Body Database
- Class
- Main-belt asteroidSource: NASA/JPL Small-Body Database
- Discovered
- 1854-Sep-01 by Ferguson, J.Source: NASA/JPL Small-Body Database
Physical size
- Mean radius
- 134 km
- Diameter
- 267 km across
- Absolute magnitude H
- 6.83
Orbit
Elements are heliocentric, referred to the J2000.0 ecliptic.
- Average distance from the Sun
- 3.162 AU (473.0 million km)
- Closest and furthest
- 2.480 AU (370.9 million km) to 3.844 AU (575.1 million km)
- Eccentricity
- 0.2158, noticeably elliptical
- Inclination to the ecliptic
- 26.31 degrees
- Orbital period
- 5.6 years (2,054 days)
- Longitude of ascending node
- 30.79 degrees
- Argument of periapsis
- 62.01 degrees
- Mean anomaly at J2000.0
- 290.30 degrees
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Catalog id euphrosyne. 3,172 objects on the map, of which 171 are hand-authored with sourced facts.