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Asteroid

Harmonia

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40 Harmonia (A856 FA)

Where is it now

Distance from Sun
2.373 AU
True anomaly
174.23°
Distance from Earth
3.326 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 Harmonia — 2.373 AU from the Sun Harmonia
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Harmonia is 3.326 AU from Earth today (27.7 light-minutes).

In the sky

Right ascension
12h 21m 04s
Declination
+01° 00′ 40″
Constellation
Virgo
Distance from Earth
3.32 AU
Elongation from the Sun
14.71° — 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
2.268 AU
Eccentricity
0.0467
Inclination
4.26°
Orbital period
3.42 years
Perihelion
2.162 AU
Aphelion
2.374 AU
Longitude of ascending node
94.15°
Argument of periapsis
269.93°
Epoch · J2000
2461200.5
Orbit class · MBA
Main-belt asteroid
Earth MOID · 452.4 LD
1.1626 AU
Tisserand (Jupiter)
3.61

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
11,061
Data arc
165.7 years
First observed
10 July 1860
Last observed
7 April 2026
Residual RMS
0.32 ″
Solution · Otto Matic
5 June 2026

Physical properties

Mean radius
56 km
Rotation period
8.91 hours

Visual & observation

Geometric albedo
0.22
Absolute magnitude (H)
6.57
Colour index (B–V)
0.85
Spectral type (SMASS)
S
Spectral type (Tholen)
S
Colour index (U–B)
0.43

Discovery & classification

Discovered by
Goldschmidt, H.
Discovery date
31 March 1856
Discovery site
Paris

Also known as 40 · A856 FA · 1950 XU

Main-Belt Asteroid Named

Sources