Skip to content
Public Universe
Asteroid

Lomia

Add to an observing list or journal →

117 Lomia (A871 RB)

Where is it now

Distance from Sun
2.951 AU
True anomaly
305.79°
Distance from Earth
2.288 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 Lomia — 2.951 AU from the Sun Lomia
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Lomia is 2.288 AU from Earth today (19.0 light-minutes).

In the sky

Right ascension
22h 13m 55s
Declination
-11° 14′ 01″
Constellation
Aquarius
Distance from Earth
2.29 AU
Elongation from the Sun
122.64° — well clear of the Sun

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
2.992 AU
Eccentricity
0.0228
Inclination
14.92°
Orbital period
5.17 years
Perihelion
2.924 AU
Aphelion
3.06 AU
Longitude of ascending node
348.61°
Argument of periapsis
53.35°
Epoch · J2000
2461200.5
Orbit class · MBA
Main-belt asteroid
Earth MOID · 754.1 LD
1.9378 AU
Tisserand (Jupiter)
3.204

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
8,527
Data arc
149.6 years
First observed
16 August 1876
Last observed
10 April 2026
Residual RMS
0.27 ″
Solution · Otto Matic
5 June 2026

Physical properties

Mean radius
104 km
Rotation period
9.13 hours

Visual & observation

Geometric albedo
0.027
Absolute magnitude (H)
8.15
Colour index (B–V)
0.69
Spectral type (SMASS)
X
Spectral type (Tholen)
XC
Colour index (U–B)
0.31

Discovery & classification

Discovered by
Borrelly, A.
Discovery date
12 September 1871
Discovery site
Marseilles

Also known as 117 · A871 RB · A900 DA · A900 MC

Main-Belt Asteroid Named

Sources