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Trans-Neptunian object

2021 LN43

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(2021 LN43)

2021 LN43 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 36.67 AU to 58.58 AU from the Sun; one orbit takes 328.7 years. Orbit from the JPL solution of 11 March 2026.

Where is it now

Distance from Sun
56.274 AU
True anomaly
210.34°
Distance from Earth
57.226 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 2021 LN43 — 56.274 AU from the Sun 2021 LN43
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2021 LN43 is 57.226 AU from Earth today (7.9 light-hours).

In the sky

Right ascension
15h 08m 33s
Declination
-10° 56′ 20″
Constellation
Libra
Distance from Earth
57.23 AU
Elongation from the Sun
16.47° — too close to the Sun to observe

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
47.623 AU
Eccentricity
0.23
Inclination
7.74°
Orbital period
328.7 years
Perihelion
36.671 AU
Aphelion
58.576 AU
Longitude of ascending node
170.41°
Argument of periapsis
207.52°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 13,883.2 LD
35.6736 AU
Tisserand (Jupiter)
5.944

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
11
Data arc
7.24 years
First observed
2 February 2015
Last observed
30 April 2022
Residual RMS
0.07 ″
Solution · Otto Matic
11 March 2026

Visual & observation

Absolute magnitude (H)
5.5

Discovery & classification

TNO

Sources