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Trans-Neptunian object

312645

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312645 (2010 EP65)

312645 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 33.02 AU to 62.04 AU from the Sun; one orbit takes 327.7 years. Discovered 9 March 2010 by Rabinowitz, D., Tourtellotte, S.. Orbit from the JPL solution of 7 June 2026.

Where is it now

Distance from Sun
33.768 AU
True anomaly
25.1°
Distance from Earth
34.747 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 312645 — 33.768 AU from the Sun 312645
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 312645 is 34.747 AU from Earth today (4.8 light-hours).

In the sky

Right ascension
14h 39m 55s
Declination
-10° 04′ 40″
Constellation
Libra
Distance from Earth
34.75 AU
Elongation from the Sun
9.69° — too close to the Sun to observe

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
47.531 AU
Eccentricity
0.3052
Inclination
18.9°
Orbital period
327.7 years
Perihelion
33.022 AU
Aphelion
62.039 AU
Longitude of ascending node
205.03°
Argument of periapsis
351.71°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 12,462.3 LD
32.0226 AU
Tisserand (Jupiter)
5.555

Orbit quality

Orbit very well determined (uncertainty code 1).

Observations used
552
Data arc
42.85 years
First observed
14 April 1983
Last observed
17 February 2026
Residual RMS
0.47 ″
Solution · Otto Matic
7 June 2026

Physical properties

Rotation period
14.97 hours

Visual & observation

Absolute magnitude (H)
5.45

Discovery & classification

Discovered by
Rabinowitz, D., Tourtellotte, S.
Discovery date
9 March 2010
Discovery site
La Silla

Also known as 2010 EP65

TNO

Sources