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Trans-Neptunian object

2025 KY58

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(2025 KY58)

Where is it now

Distance from Sun
39.298 AU
True anomaly
38.31°
Distance from Earth
39.459 AU
As of
22 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 2025 KY58 — 39.298 AU from the Sun 2025 KY58
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 KY58 is 39.459 AU from Earth today (5.5 light-hours).

In the sky

Right ascension
19h 23m 27s
Declination
-21° 39′ 11″
Constellation
Sagittarius
Distance from Earth
39.47 AU
Elongation from the Sun
79.45° — well clear of the Sun

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
45.579 AU
Eccentricity
0.164
Inclination
7.96°
Orbital period
307.7 years
Perihelion
38.106 AU
Aphelion
53.052 AU
Longitude of ascending node
113.61°
Argument of periapsis
138.8°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Tisserand (Jupiter)
5.897

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 8).

Observations used
48
Data arc
62 days
First observed
28 May 2025
Last observed
29 July 2025
Residual RMS
0.13 ″

Visual & observation

Absolute magnitude (H)
7.52

Discovery & classification

TNO

Sources