3 Juno
A main-belt asteroid about 247 km across, 2.7 AU out and 4.4 years to a lap of the Sun.
Where it is right now
3 Juno is in Aquila, 1.79 AU away, magnitude 9.2.
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
- 247 kmSource: NASA/JPL Small-Body Database
- Orbital period
- 4.4 yearsSource: NASA/JPL Small-Body Database
- Distance from the Sun
- 2.671 AU on averageSource: NASA/JPL Small-Body Database
- Orbit shape
- eccentricity 0.256, inclined 13.0 degrees to the eclipticSource: NASA/JPL Small-Body Database
- Class
- Main-belt asteroidSource: NASA/JPL Small-Body Database
- Discovered
- 1804-Sep-01 by Harding, K.Source: NASA/JPL Small-Body Database
Physical size
- Mean radius
- 123 km
- Diameter
- 247 km across
- Absolute magnitude H
- 5.19
Orbit
Elements are heliocentric, referred to the J2000.0 ecliptic.
- Average distance from the Sun
- 2.671 AU (399.6 million km)
- Closest and furthest
- 1.988 AU (297.4 million km) to 3.354 AU (501.7 million km)
- Eccentricity
- 0.2557, noticeably elliptical
- Inclination to the ecliptic
- 12.99 degrees
- Orbital period
- 4.4 years (1,594 days)
- Longitude of ascending node
- 169.81 degrees
- Argument of periapsis
- 247.90 degrees
- Mean anomaly at J2000.0
- 242.66 degrees
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Catalog id juno. 3,172 objects on the map, of which 171 are hand-authored with sourced facts.