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Asteroid

Urania

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30 Urania (A854 OA)

Where is it now

Distance from Sun
2.198 AU
True anomaly
62.25°
Distance from Earth
2.055 AU
As of
21 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 — 0.995 AU from the Sun Earth Urania — 2.198 AU from the Sun Urania
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Urania is 2.055 AU from Earth today (17.1 light-minutes).

In the sky

Right ascension
08h 25m 20s
Declination
+20° 25′ 21″
Constellation
Cancer
Distance from Earth
2.05 AU
Elongation from the Sun
84.74° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

From your location

See how high it is right now, whether it is up after civil twilight, 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
2.365 AU
Eccentricity
0.1266
Inclination
2.09°
Orbital period
3.64 years
Perihelion
2.066 AU
Aphelion
2.665 AU
Longitude of ascending node
307.4°
Argument of periapsis
87.23°
Epoch · J2000
2461200.5
Orbit class · MBA
Main-belt asteroid
Earth MOID · 417.3 LD
1.0723 AU
Tisserand (Jupiter)
3.537

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
4,904
Data arc
165.9 years
First observed
22 February 1860
Last observed
18 January 2026
Residual RMS
0.44 ″
Solution · Otto Matic
5 June 2026

Physical properties

Mean radius
46 km
Rotation period
13.69 hours

Visual & observation

Geometric albedo
0.192
Absolute magnitude (H)
7.57
Colour index (B–V)
0.87
Spectral type (SMASS)
Sl
Spectral type (Tholen)
S
Colour index (U–B)
0.46

Discovery & classification

Discovered by
Hind, J. R.
Discovery date
22 July 1854
Discovery site
London

Also known as 30 · A854 OA · 1948 JK

Main-Belt Asteroid Named

Sources