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Trans-Neptunian object

130391

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130391 (2000 JG81)

130391 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 34.08 AU to 60.36 AU from the Sun; one orbit takes 324.5 years. Discovered 6 May 2000 by La Silla. Orbit from the JPL solution of 13 April 2021.

Where is it now

Distance from Sun
37.97 AU
True anomaly
58.02°
Distance from Earth
38.482 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 130391 — 37.97 AU from the Sun 130391
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 130391 is 38.482 AU from Earth today (5.3 light-hours).

In the sky

Right ascension
17h 55m 37s
Declination
-40° 06′ 48″
Constellation
Scorpius
Distance from Earth
38.48 AU
Elongation from the Sun
58.36° — near the Sun — look low at dusk or dawn

Favours the southern hemisphere; low or below the horizon from far north.

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
47.219 AU
Eccentricity
0.2782
Inclination
23.47°
Orbital period
324.5 years
Perihelion
34.083 AU
Aphelion
60.356 AU
Longitude of ascending node
46.01°
Argument of periapsis
168.88°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 12,873.7 LD
33.0798 AU
Tisserand (Jupiter)
5.418

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
22
Data arc
8.04 years
First observed
17 April 1999
Last observed
2 May 2007
Residual RMS
0.17 ″
Solution · Otto Matic
13 April 2021

Visual & observation

Absolute magnitude (H)
7.96

Discovery & classification

Discovered by
La Silla
Discovery date
6 May 2000
Discovery site
La Silla

Also known as 2000 JG81

TNO

Sources