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Asteroid Near-Earth

2023 UG4

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(2023 UG4)

Where is it now

Distance from Sun
0.807 AU
True anomaly
335.9°
Distance from Earth
1.478 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 2023 UG4 — 0.807 AU from the Sun 2023 UG4
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 UG4 is 1.478 AU from Earth today (12.3 light-minutes).

In the sky

Right ascension
11h 55m 05s
Declination
+00° 46′ 28″
Constellation
Virgo
Distance from Earth
1.48 AU
Elongation from the Sun
30.9° — 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
0.941 AU
Eccentricity
0.1516
Inclination
0.53°
Orbital period
333.3 days
Perihelion
0.798 AU
Aphelion
1.083 AU
Longitude of ascending node
89.11°
Argument of periapsis
74.11°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 1.5 LD
0.0038 AU
Tisserand (Jupiter)
6.372

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
43
Data arc
20 days
First observed
20 October 2023
Last observed
9 November 2023
Residual RMS
0.43 ″
Solution · Otto Matic
9 December 2023

Visual & observation

Absolute magnitude (H)
26.45

Discovery & classification

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

Aten Near-Earth Object

Close approaches 41 on record

Flyby geometry
Ecliptic flyby of 2023 UG4 at 2032-07-29 08:19 UTC Top-down view of the ecliptic, Earth at the centre, for the 2032-07-29 08:19 UTC close approach of 2023 UG4. Catalogue miss distance 190.2 LD · 7.31 × 10⁷ km. The curve is the geocentric path from 2032-07-26 to 2032-08-01, 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 190.2 LD · 7.31 × 10⁷ km 2032-07-29 08:19 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2032-07-29 08:19 UTC close approach of 2023 UG4. Catalogue miss distance 190.2 LD · 7.31 × 10⁷ km. The curve is the geocentric path from 2032-07-26 to 2032-08-01, 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
2032-07-29 08:19:00 Earth 0.4888 AU 190.2 LD 18.6 km/s
2033-07-21 06:37:00 Earth 0.0334 AU 13.0 LD 3.1 km/s
2034-01-31 06:04:00 Earth 0.1763 AU 68.6 LD 5 km/s
2034-10-29 03:24:00 Earth 0.3051 AU 118.7 LD 13.3 km/s
2036-11-16 00:39:00 Venus 0.086 AU 33.5 LD 0.6 km/s
2043-07-13 21:51:00 Earth 0.0598 AU 23.3 LD 5.7 km/s
2044-02-25 06:12:00 Earth 0.1919 AU 74.7 LD 5.7 km/s
2044-11-03 02:45:00 Earth 0.1954 AU 76.1 LD 9.9 km/s
2053-07-18 20:08:00 Earth 0.2358 AU 91.8 LD 11 km/s
2054-04-05 15:51:00 Earth 0.1869 AU 72.7 LD 5.3 km/s

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

Sources