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Trans-Neptunian object

2009 JX18

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(2009 JX18)

Where is it now

Distance from Sun
21.77 AU
True anomaly
320.12°
Distance from Earth
22.646 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 2009 JX18 — 21.77 AU from the Sun 2009 JX18
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2009 JX18 is 22.646 AU from Earth today (3.1 light-hours).

In the sky

Right ascension
15h 06m 29s
Declination
-21° 21′ 12″
Constellation
Libra
Distance from Earth
22.65 AU
Elongation from the Sun
27.2° — 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
37.588 AU
Eccentricity
0.4635
Inclination
20.18°
Orbital period
230.5 years
Perihelion
20.167 AU
Aphelion
55.009 AU
Longitude of ascending node
40.72°
Argument of periapsis
231.14°
Epoch · J2000
2454971.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 7,467.9 LD
19.1891 AU
Tisserand (Jupiter)
4.609

Orbit quality

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

Observations used
8
Data arc
11 days
First observed
14 May 2009
Last observed
25 May 2009
Residual RMS
0.19 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
9.84

Discovery & classification

TNO

Sources