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Trans-Neptunian object

2020 KO55

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(2020 KO55)

2020 KO55 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 37.7 AU to 58.31 AU from the Sun; one orbit takes 332.7 years. Orbit from the JPL solution of 24 April 2023.

Where is it now

Distance from Sun
43.695 AU
True anomaly
282.95°
Distance from Earth
43.862 AU
As of
25 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.

Sun Earth — 0.994 AU from the Sun Earth 2020 KO55 — 43.695 AU from the Sun 2020 KO55
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2020 KO55 is 43.862 AU from Earth today (6.1 light-hours).

In the sky

Right ascension
19h 33m 00s
Declination
-18° 25′ 17″
Constellation
Sagittarius
Distance from Earth
43.88 AU
Elongation from the Sun
78.77° — well clear of the Sun

Favours the southern hemisphere; low or below the horizon from far north.

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
48.009 AU
Eccentricity
0.2146
Inclination
5.44°
Orbital period
332.7 years
Perihelion
37.704 AU
Aphelion
58.314 AU
Longitude of ascending node
256.44°
Argument of periapsis
114.04°
Epoch · J2000
2459032.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,285.9 LD
36.7085 AU
Tisserand (Jupiter)
6.015

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 8).

Observations used
18
Data arc
77 days
First observed
29 May 2020
Last observed
14 August 2020
Residual RMS
0.04 ″
Solution · Otto Matic
24 April 2023

Visual & observation

Absolute magnitude (H)
9.65

Discovery & classification

TNO

Sources