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Trans-Neptunian object

138537

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138537 (2000 OK67)

138537 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 40.04 AU to 53.1 AU from the Sun; one orbit takes 317.8 years. Discovered 29 July 2000 by Buie, M. W., Kern, S. D.. Orbit from the JPL solution of 7 November 2025.

Where is it now

Distance from Sun
40.06 AU
True anomaly
4.83°
Distance from Earth
39.14 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 138537 — 40.06 AU from the Sun 138537
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 138537 is 39.14 AU from Earth today (5.4 light-hours).

In the sky

Right ascension
00h 31m 44s
Declination
+03° 54′ 02″
Constellation
Pisces
Distance from Earth
39.14 AU
Elongation from the Sun
156.83° — 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
46.569 AU
Eccentricity
0.1401
Inclination
4.89°
Orbital period
317.8 years
Perihelion
40.043 AU
Aphelion
53.096 AU
Longitude of ascending node
4.39°
Argument of periapsis
0.18°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 15,193.2 LD
39.0398 AU
Tisserand (Jupiter)
6.014

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
286
Data arc
24.26 years
First observed
29 July 2000
Last observed
1 November 2024
Residual RMS
0.52 ″
Solution · Otto Matic
7 November 2025

Physical properties

Rotation period
6 hours

Visual & observation

Absolute magnitude (H)
6.18

Discovery & classification

Discovered by
Buie, M. W., Kern, S. D.
Discovery date
29 July 2000
Discovery site
Cerro Tololo

Also known as 2000 OK67

TNO

Sources