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Trans-Neptunian object

2005 JA186

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(2005 JA186)

2005 JA186 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 43.69 AU to 53.06 AU from the Sun; one orbit takes 336.5 years. Orbit from the JPL solution of 29 November 2022.

Where is it now

Distance from Sun
44.423 AU
True anomaly
35.53°
Distance from Earth
45.163 AU
As of
26 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 2005 JA186 — 44.423 AU from the Sun 2005 JA186
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2005 JA186 is 45.163 AU from Earth today (6.3 light-hours).

In the sky

Right ascension
16h 51m 43s
Declination
-25° 42′ 23″
Constellation
Scorpius
Distance from Earth
45.16 AU
Elongation from the Sun
41.33° — 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
48.375 AU
Eccentricity
0.0968
Inclination
4.19°
Orbital period
336.5 years
Perihelion
43.693 AU
Aphelion
53.056 AU
Longitude of ascending node
25.2°
Argument of periapsis
194.83°
Epoch · J2000
2453506.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 16,612.0 LD
42.6855 AU
Tisserand (Jupiter)
6.161

Orbit quality

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

Observations used
7
Data arc
18 days
First observed
14 May 2005
Last observed
1 June 2005
Residual RMS
0.34 ″
Solution · Otto Matic
29 November 2022

Visual & observation

Absolute magnitude (H)
6.61

Discovery & classification

TNO

Sources