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Trans-Neptunian object

44594

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44594 (1999 OX3)

Where is it now

Distance from Sun
17.807 AU
True anomaly
15.44°
Distance from Earth
17.02 AU
As of
15 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 — 0.997 AU from the Sun Earth 44594 — 17.807 AU from the Sun 44594
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 44594 is 17.02 AU from Earth today (2.4 light-hours).

In the sky

Right ascension
03h 55m 33s
Declination
+21° 19′ 15″
Constellation
Taurus
Distance from Earth
17.02 AU
Elongation from the Sun
141.53° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
32.606 AU
Eccentricity
0.4601
Inclination
2.62°
Orbital period
186.2 years
Perihelion
17.605 AU
Aphelion
47.608 AU
Longitude of ascending node
259.16°
Argument of periapsis
144.6°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 6,465.4 LD
16.6131 AU
Tisserand (Jupiter)
4.6

Orbit quality

Orbit very well determined (uncertainty code 1).

Observations used
1,218
Data arc
26.57 years
First observed
21 July 1999
Last observed
13 February 2026
Residual RMS
0.41 ″
Solution · Otto Matic
6 June 2026

Physical properties

Rotation period
9.26 hours

Visual & observation

Absolute magnitude (H)
7.1

Discovery & classification

Discovered by
Kavelaars, J. J., Gladman, B., Holman, M. J., Petit, J.-M.
Discovery date
21 July 1999
Discovery site
Mauna Kea

Also known as 1999 OX3

TNO

Close approaches 2 on record

When (UTC) Body Distance Lunar distances Relative speed
2030-10-27 15:22:00 Urnus 0.5708 AU 222.1 LD 2.2 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources