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Trans-Neptunian object

554856

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554856 (2013 CF229)

554856 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 42.43 AU to 53.87 AU from the Sun; one orbit takes 334.1 years. Discovered 3 February 2013 by Pan-STARRS 1. Orbit from the JPL solution of 10 April 2025.

Where is it now

Distance from Sun
42.57 AU
True anomaly
345.89°
Distance from Earth
42.983 AU
As of
26 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 554856 — 42.57 AU from the Sun 554856
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 554856 is 42.983 AU from Earth today (6.0 light-hours).

In the sky

Right ascension
10h 02m 00s
Declination
+11° 33′ 16″
Constellation
Leo
Distance from Earth
42.98 AU
Elongation from the Sun
64.81° — 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
48.151 AU
Eccentricity
0.1187
Inclination
8.62°
Orbital period
334.1 years
Perihelion
42.434 AU
Aphelion
53.869 AU
Longitude of ascending node
150.41°
Argument of periapsis
10.97°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 16,128.5 LD
41.443 AU
Tisserand (Jupiter)
6.081

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
111
Data arc
15.07 years
First observed
4 February 2010
Last observed
3 March 2025
Residual RMS
0.71 ″
Solution · Otto Matic
10 April 2025

Visual & observation

Absolute magnitude (H)
6.14

Discovery & classification

Discovered by
Pan-STARRS 1
Discovery date
3 February 2013
Discovery site
Haleakala

Also known as 2013 CF229

TNO

Sources