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Asteroid Near-Earth

2020 UO4

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(2020 UO4)

Where is it now

Distance from Sun
1.06 AU
True anomaly
192.19°
Distance from Earth
1.258 AU
As of
24 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 2020 UO4 — 1.06 AU from the Sun 2020 UO4
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2020 UO4 is 1.258 AU from Earth today (10.5 light-minutes).

In the sky

Right ascension
10h 32m 42s
Declination
+07° 51′ 49″
Constellation
Leo
Distance from Earth
1.26 AU
Elongation from the Sun
54.69° — 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
0.974 AU
Eccentricity
0.0915
Inclination
1.46°
Orbital period
350.9 days
Perihelion
0.884 AU
Aphelion
1.063 AU
Longitude of ascending node
210.43°
Argument of periapsis
64.11°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 1.0 LD
0.0025 AU
Tisserand (Jupiter)
6.206

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
82
Data arc
494 days
First observed
19 October 2020
Last observed
25 February 2022
Residual RMS
0.52 ″
Solution · Otto Matic
11 March 2022

Visual & observation

Absolute magnitude (H)
28.64

Discovery & classification

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

Aten Near-Earth Object

Close approaches 53 on record

Flyby geometry
Ecliptic flyby of 2020 UO4 at 2043-10-29 03:33 UTC Top-down view of the ecliptic, Earth at the centre, for the 2043-10-29 03:33 UTC close approach of 2020 UO4. Catalogue miss distance 141.2 LD · 5.43 × 10⁷ km. The curve is the geocentric path from 2043-10-26 to 2043-11-01, 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 141.2 LD · 5.43 × 10⁷ km 2043-10-29 03:33 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2043-10-29 03:33 UTC close approach of 2020 UO4. Catalogue miss distance 141.2 LD · 5.43 × 10⁷ km. The curve is the geocentric path from 2043-10-26 to 2043-11-01, 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
2043-10-29 03:33:00 Earth 0.3628 AU 141.2 LD 14.2 km/s
2044-10-19 14:32:00 Earth 0.1207 AU 47.0 LD 6.8 km/s
2045-08-23 11:57:00 Earth 0.1038 AU 40.4 LD 2.7 km/s
2045-12-10 04:49:00 Earth 0.0789 AU 30.7 LD 2.7 km/s
2046-05-30 11:22:00 Earth 0.1244 AU 48.4 LD 3.5 km/s
2047-03-08 22:14:00 Earth 0.0547 AU 21.3 LD 4.8 km/s
2048-02-27 19:32:00 Earth 0.3087 AU 120.1 LD 12.5 km/s
2066-11-03 13:48:00 Earth 0.4857 AU 189.0 LD 17.9 km/s
2067-10-25 03:50:00 Earth 0.2324 AU 90.4 LD 10.2 km/s
2068-10-20 23:35:00 Earth 0.0217 AU 8.4 LD 2.7 km/s

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

Sources