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Asteroid

Adeona

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145 Adeona (A875 LB)

Where is it now

Distance from Sun
2.279 AU
True anomaly
352.83°
Distance from Earth
2.429 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 Adeona — 2.279 AU from the Sun Adeona
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Adeona is 2.429 AU from Earth today (20.2 light-minutes).

In the sky

Right ascension
09h 36m 20s
Declination
+21° 58′ 35″
Constellation
Leo
Distance from Earth
2.43 AU
Elongation from the Sun
69.64° — 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
2.671 AU
Eccentricity
0.1476
Inclination
12.62°
Orbital period
4.37 years
Perihelion
2.277 AU
Aphelion
3.065 AU
Longitude of ascending node
77.32°
Argument of periapsis
45.26°
Epoch · J2000
2461200.5
Orbit class · MBA
Main-belt asteroid
Earth MOID · 510.2 LD
1.311 AU
Tisserand (Jupiter)
3.331

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
12,054
Data arc
150.8 years
First observed
4 June 1875
Last observed
13 March 2026
Residual RMS
0.24 ″
Solution · Otto Matic
5 June 2026

Physical properties

Mean radius
64 km
Rotation period
15.07 hours

Visual & observation

Geometric albedo
0.061
Absolute magnitude (H)
8.4
Colour index (B–V)
0.7
Spectral type (SMASS)
Ch
Spectral type (Tholen)
C
Colour index (U–B)
0.35

Discovery & classification

Discovered by
Peters, C. H. F.
Discovery date
3 June 1875
Discovery site
Clinton

Also known as 145 · A875 LB

Main-Belt Asteroid Named

Sources