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Trans-Neptunian object

2023 FJ57

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(2023 FJ57)

Where is it now

Distance from Sun
42.416 AU
True anomaly
231.02°
Distance from Earth
43.093 AU
As of
17 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 — 0.996 AU from the Sun Earth 2023 FJ57 — 42.416 AU from the Sun 2023 FJ57
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 FJ57 is 43.093 AU from Earth today (6.0 light-hours).

In the sky

Right ascension
10h 43m 09s
Declination
+11° 53′ 32″
Constellation
Leo
Distance from Earth
43.09 AU
Elongation from the Sun
46.77° — near the Sun — look low at dusk or dawn

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
39.655 AU
Eccentricity
0.1277
Inclination
7.02°
Orbital period
249.7 years
Perihelion
34.59 AU
Aphelion
44.72 AU
Longitude of ascending node
7.09°
Argument of periapsis
278.51°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 13,068.6 LD
33.5804 AU
Tisserand (Jupiter)
5.566

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
13
Data arc
2.98 years
First observed
21 March 2023
Last observed
13 March 2026
Residual RMS
0.17 ″
Solution · Otto Matic
5 June 2026

Visual & observation

Absolute magnitude (H)
7.58

Discovery & classification

TNO

Sources