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Trans-Neptunian object

612733

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612733 (2003 YU179)

612733 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 39.32 AU to 54.79 AU from the Sun; one orbit takes 322.8 years. Discovered 24 December 2003 by Mauna Kea. Orbit from the JPL solution of 10 April 2025.

Where is it now

Distance from Sun
41.547 AU
True anomaly
51.69°
Distance from Earth
41.962 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 612733 — 41.547 AU from the Sun 612733
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 612733 is 41.962 AU from Earth today (5.8 light-hours).

In the sky

Right ascension
09h 57m 37s
Declination
+14° 06′ 26″
Constellation
Leo
Distance from Earth
41.95 AU
Elongation from the Sun
65.58° — 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
47.053 AU
Eccentricity
0.1644
Inclination
4.85°
Orbital period
322.8 years
Perihelion
39.317 AU
Aphelion
54.788 AU
Longitude of ascending node
126.43°
Argument of periapsis
327.33°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,918.8 LD
38.3346 AU
Tisserand (Jupiter)
6.022

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
45
Data arc
18.19 years
First observed
24 December 2003
Last observed
2 March 2022
Residual RMS
0.14 ″
Solution · Otto Matic
10 April 2025

Physical properties

Rotation period
5.5 hours

Visual & observation

Absolute magnitude (H)
6.95

Discovery & classification

Discovered by
Mauna Kea
Discovery date
24 December 2003
Discovery site
Mauna Kea

Also known as 2003 YU179

TNO

Sources