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Asteroid

Kolga

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191 Kolga (A878 SB)

Where is it now

Distance from Sun
2.646 AU
True anomaly
352.54°
Distance from Earth
1.695 AU
As of
22 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 Kolga — 2.646 AU from the Sun Kolga
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Kolga is 1.695 AU from Earth today (14.1 light-minutes).

In the sky

Right ascension
00h 57m 34s
Declination
-06° 12′ 37″
Constellation
Cetus
Distance from Earth
1.7 AU
Elongation from the Sun
157.67° — 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
2.896 AU
Eccentricity
0.0869
Inclination
11.52°
Orbital period
4.93 years
Perihelion
2.644 AU
Aphelion
3.148 AU
Longitude of ascending node
159.16°
Argument of periapsis
226.68°
Epoch · J2000
2461200.5
Orbit class · MBA
Main-belt asteroid
Earth MOID · 645.7 LD
1.6592 AU
Tisserand (Jupiter)
3.253

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
10,640
Data arc
34.34 years
First observed
16 July 1991
Last observed
15 November 2025
Residual RMS
0.2 ″
Solution · Otto Matic
5 June 2026

Physical properties

Mean radius
47 km
Rotation period
17.6 hours

Visual & observation

Geometric albedo
0.046
Absolute magnitude (H)
9.09
Colour index (B–V)
0.68
Spectral type (SMASS)
Cb
Spectral type (Tholen)
XC:
Colour index (U–B)
0.26

Discovery & classification

Discovered by
Peters, C. H. F.
Discovery date
30 September 1878
Discovery site
Clinton

Also known as 191 · A878 SB · 1949 YP

Main-Belt Asteroid Named

Sources