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Trans-Neptunian object

2023 FK57

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(2023 FK57)

Where is it now

Distance from Sun
38.544 AU
True anomaly
10.69°
Distance from Earth
39.265 AU
As of
20 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 FK57 — 38.544 AU from the Sun 2023 FK57
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 FK57 is 39.265 AU from Earth today (5.4 light-hours).

In the sky

Right ascension
11h 06m 55s
Declination
+08° 50′ 26″
Constellation
Leo
Distance from Earth
39.26 AU
Elongation from the Sun
43.85° — 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
43.939 AU
Eccentricity
0.1245
Inclination
28.24°
Orbital period
291.3 years
Perihelion
38.47 AU
Aphelion
49.408 AU
Longitude of ascending node
157.8°
Argument of periapsis
355.58°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,586.6 LD
37.481 AU
Tisserand (Jupiter)
5.198

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
9
Data arc
410 days
First observed
21 March 2023
Last observed
4 May 2024
Residual RMS
0.15 ″
Solution · Otto Matic
11 March 2026

Visual & observation

Absolute magnitude (H)
7.67

Discovery & classification

TNO

Sources