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Trans-Neptunian object

2021 CJ46

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(2021 CJ46)

Where is it now

Distance from Sun
43.707 AU
True anomaly
282.31°
Distance from Earth
43.741 AU
As of
21 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 — 0.995 AU from the Sun Earth 2021 CJ46 — 43.707 AU from the Sun 2021 CJ46
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2021 CJ46 is 43.741 AU from Earth today (6.1 light-hours).

In the sky

Right ascension
08h 12m 26s
Declination
+19° 41′ 02″
Constellation
Cancer
Distance from Earth
43.74 AU
Elongation from the Sun
87.6° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
44.157 AU
Eccentricity
0.0405
Inclination
3.36°
Orbital period
293.4 years
Perihelion
42.369 AU
Aphelion
45.946 AU
Longitude of ascending node
124.22°
Argument of periapsis
73.11°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 16,099.8 LD
41.3694 AU
Tisserand (Jupiter)
5.929

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
29
Data arc
15.93 years
First observed
10 January 2010
Last observed
14 December 2025
Residual RMS
0.56 ″
Solution · Otto Matic
11 March 2026

Visual & observation

Absolute magnitude (H)
5.55

Discovery & classification

TNO

Sources