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Solar
Asteroid

Juno

3 Juno (A804 RA)

Where is it now

Distance from Sun
2.622 AU
True anomaly
259.17°
Distance from Earth
2.161 AU
As of
2 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 1.001 AU from the Sun Earth Juno — 2.622 AU from the Sun Juno
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Juno is 2.161 AU from Earth today (18.0 light-minutes).

In the sky

Right ascension
19h 45m 28s
Declination
-12° 38′ 35″
Constellation
Sagittarius
Distance from Earth
2.17 AU
Elongation from the Sun
105.52° — well clear of the Sun

Visible from both hemispheres.

From your location

See how high it is right now, whether it's up after dark, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
2.671 AU
Eccentricity
0.2557
Inclination
12.99°
Orbital period
4.37 years
Perihelion
1.988 AU
Aphelion
3.354 AU
Longitude of ascending node
169.81°
Argument of periapsis
247.9°
Epoch · J2000
2461200.5
Orbit class · MBA
Main-belt asteroid
Earth MOID · 404.1 LD
1.0383 AU
Tisserand (Jupiter)
3.298

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
8,343
Data arc
221.5 years
First observed
17 October 1804
Last observed
13 April 2026
Residual RMS
0.36 ″
Solution · Otto Matic
5 June 2026

Physical properties

Mean radius
123 km
Rotation period
7.21 hours

Visual & observation

Geometric albedo
0.214
Absolute magnitude (H)
5.19
Colour index (B–V)
0.82
Spectral type (SMASS)
Sk
Spectral type (Tholen)
S
Colour index (U–B)
0.43

Discovery & classification

Discovered by
Harding, K.
Discovery date
1 September 1804
Discovery site
Lilienthal

Also known as 3 · A804 RA

Main-Belt Asteroid Named

Sources