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Trans-Neptunian object

554780

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554780 (2013 AQ183)

554780 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 38.93 AU to 54.58 AU from the Sun; one orbit takes 319.7 years. Discovered 10 January 2013 by Pan-STARRS 1. Orbit from the JPL solution of 27 April 2023.

Where is it now

Distance from Sun
39.183 AU
True anomaly
17.17°
Distance from Earth
39.74 AU
As of
24 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 554780 — 39.183 AU from the Sun 554780
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 554780 is 39.74 AU from Earth today (5.5 light-hours).

In the sky

Right ascension
10h 28m 59s
Declination
+07° 56′ 21″
Constellation
Leo
Distance from Earth
39.73 AU
Elongation from the Sun
56.04° — near the Sun — look low at dusk or dawn

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
46.757 AU
Eccentricity
0.1673
Inclination
2.59°
Orbital period
319.7 years
Perihelion
38.933 AU
Aphelion
54.581 AU
Longitude of ascending node
189.94°
Argument of periapsis
307.67°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,768.0 LD
37.9472 AU
Tisserand (Jupiter)
6.016

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
98
Data arc
20.06 years
First observed
29 January 2003
Last observed
20 February 2023
Residual RMS
0.69 ″
Solution · Otto Matic
27 April 2023

Physical properties

Rotation period
5 hours

Visual & observation

Absolute magnitude (H)
6.82

Discovery & classification

Discovered by
Pan-STARRS 1
Discovery date
10 January 2013
Discovery site
Haleakala

Also known as 2013 AQ183

TNO

Sources