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Trans-Neptunian object

2019 AU138

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(2019 AU138)

Where is it now

Distance from Sun
31.508 AU
True anomaly
117.77°
Distance from Earth
32.239 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 2019 AU138 — 31.508 AU from the Sun 2019 AU138
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2019 AU138 is 32.239 AU from Earth today (4.5 light-hours).

In the sky

Right ascension
10h 32m 48s
Declination
-05° 59′ 24″
Constellation
Sextans
Distance from Earth
32.24 AU
Elongation from the Sun
42.53° — near the Sun — look low at dusk or dawn

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
31.217 AU
Eccentricity
0.0207
Inclination
18.36°
Orbital period
174.4 years
Perihelion
30.569 AU
Aphelion
31.864 AU
Longitude of ascending node
290.38°
Argument of periapsis
114.24°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 11,527.4 LD
29.6202 AU
Tisserand (Jupiter)
4.815

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
62
Data arc
23.23 years
First observed
9 January 2002
Last observed
1 April 2025
Residual RMS
0.25 ″
Solution · Otto Matic
11 April 2025

Visual & observation

Absolute magnitude (H)
7.86

Discovery & classification

TNO

Sources