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Asteroid

Aegina

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91 Aegina (A866 VA)

Where is it now

Distance from Sun
2.625 AU
True anomaly
103.49°
Distance from Earth
3.611 AU
As of
11 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 — 0.998 AU from the Sun Earth Aegina — 2.625 AU from the Sun Aegina
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Aegina is 3.611 AU from Earth today (30.0 light-minutes).

In the sky

Right ascension
12h 40m 53s
Declination
-04° 20′ 02″
Constellation
Virgo
Distance from Earth
3.61 AU
Elongation from the Sun
7.95° — too close to the Sun to observe

Visible from both hemispheres.

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
2.589 AU
Eccentricity
0.1081
Inclination
2.1°
Orbital period
4.17 years
Perihelion
2.309 AU
Aphelion
2.869 AU
Longitude of ascending node
10.36°
Argument of periapsis
74.09°
Epoch · J2000
2461200.5
Orbit class · MBA
Main-belt asteroid
Earth MOID · 516.0 LD
1.3259 AU
Tisserand (Jupiter)
3.411

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
11,684
Data arc
159.4 years
First observed
10 November 1866
Last observed
12 April 2026
Residual RMS
0.27 ″
Solution · Otto Matic
5 June 2026

Physical properties

Mean radius
52 km
Rotation period
6.03 hours

Visual & observation

Geometric albedo
0.048
Absolute magnitude (H)
9.12
Colour index (B–V)
0.72
Spectral type (SMASS)
Ch
Spectral type (Tholen)
CP
Colour index (U–B)
0.32

Discovery & classification

Discovered by
Stephan, E.
Discovery date
4 November 1866
Discovery site
Marseilles

Also known as 91 · A866 VA

Main-Belt Asteroid Named

Sources