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Asteroid Near-Earth

2025 UK9

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(2025 UK9)

Where is it now

Distance from Sun
1.079 AU
True anomaly
238.49°
Distance from Earth
0.085 AU
As of
11 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 — 0.998 AU from the Sun Earth 2025 UK9 — 1.079 AU from the Sun 2025 UK9
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 UK9 is 0.085 AU from Earth today (42.4 light-seconds).

In the sky

Right ascension
02h 19m 15s
Declination
+04° 11′ 26″
Constellation
Cetus
Distance from Earth
0.08 AU
Elongation from the Sun
162.3° — near opposition — up most of the night

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
1 AU
Eccentricity
0.2629
Inclination
2.26°
Orbital period
365.3 days
Perihelion
0.737 AU
Aphelion
1.263 AU
Longitude of ascending node
38.17°
Argument of periapsis
102.95°
Epoch · J2000
2461200.5
Orbit class · APO
Apollo
Earth MOID · 0.2 LD
0.0005 AU
Tisserand (Jupiter)
6.048

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
21
Data arc
2 days
First observed
28 October 2025
Last observed
30 October 2025
Residual RMS
0.45 ″
Solution · Otto Matic
29 October 2025

Visual & observation

Absolute magnitude (H)
29.83

Discovery & classification

Listed by JPL impact monitoring; see the Sentry table for current probabilities.

Apollo Near-Earth Object

Close approaches 16 on record

Flyby geometry
Ecliptic flyby of 2025 UK9 at 2026-10-31 02:35 UTC Top-down view of the ecliptic, Earth at the centre, for the 2026-10-31 02:35 UTC close approach of 2025 UK9. Catalogue miss distance 0.82 LD · 314,648 km. The curve is the geocentric path from 2026-10-28 to 2026-11-03, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 29 Oct 30 Oct 2 Nov 3 Nov 0.82 LD · 314,648 km 2026-10-31 02:35 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2026-10-31 02:35 UTC close approach of 2025 UK9. Catalogue miss distance 0.82 LD · 314,648 km. The curve is the geocentric path from 2026-10-28 to 2026-11-03, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2026-10-30 19:11:00 Moon 0.0008 AU 0.3 LD 7 km/s
2026-10-31 02:35:00 Earth 0.0021 AU 0.8 LD 7.8 km/s
2027-10-24 07:15:00 Earth 0.1994 AU 77.6 LD 13.6 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources