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Trans-Neptunian object

2015 OH193

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(2015 OH193)

Where is it now

Distance from Sun
40.461 AU
True anomaly
261.81°
Distance from Earth
39.596 AU
As of
17 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 — 0.996 AU from the Sun Earth 2015 OH193 — 40.461 AU from the Sun 2015 OH193
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 OH193 is 39.596 AU from Earth today (5.5 light-hours).

In the sky

Right ascension
23h 36m 35s
Declination
-00° 36′ 49″
Constellation
Pisces
Distance from Earth
39.6 AU
Elongation from the Sun
149.59° — 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
40.255 AU
Eccentricity
0.0694
Inclination
24.32°
Orbital period
255.4 years
Perihelion
37.46 AU
Aphelion
43.05 AU
Longitude of ascending node
178.91°
Argument of periapsis
274°
Epoch · J2000
2457232.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,230.9 LD
36.5672 AU
Tisserand (Jupiter)
5.186

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 9).

Observations used
15
Data arc
36 days
First observed
15 July 2015
Last observed
20 August 2015
Residual RMS
0.1 ″
Solution · Otto Matic
11 April 2025

Visual & observation

Absolute magnitude (H)
9.22

Discovery & classification

TNO

Sources