2023 UH is an asteroid in the Apollo orbit class. Its orbit takes it from 0.89 AU to 1.19 AU from the Sun; one orbit takes 387.5 days. Orbit from the JPL solution of 20 October 2023.
Where is it now
- Distance from Sun
- 1.123 AU
- True anomaly
- 229.43°
- Distance from Earth
- 1.048 AU
- As of
- 4 November 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.
In the sky
- Right ascension
- 19h 29m 30s
- Declination
- -36° 28′ 52″
- Constellation
- Sagittarius
- Distance from Earth
- 1.05 AU
- Elongation from the Sun
- 66.74° — 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.
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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
- 1.04 AU
- Eccentricity
- 0.1425
- Inclination
- 19.89°
- Orbital period
- 387.5 days
- Perihelion
- 0.892 AU
- Aphelion
- 1.188 AU
- Longitude of ascending node
- 25.92°
- Argument of periapsis
- 87.21°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 5.6 LD
- 0.0144 AU
- Tisserand (Jupiter)
- 5.835
Orbit quality
Orbit poorly determined (uncertainty code 7).
- Observations used
- 30
- Data arc
- 3 days
- First observed
- 16 October 2023
- Last observed
- 19 October 2023
- Residual RMS
- 0.45 ″
- Solution · Otto Matic
- 20 October 2023
Visual & observation
- Absolute magnitude (H)
- 26.13
Discovery & classification
Close approaches 26 on record
Top-down view of the ecliptic, Earth at the centre, for the 2040-10-13 16:45 UTC close approach of 2023 UH. Catalogue miss distance 78.2 LD · 3.01 × 10⁷ km. The curve is the geocentric path from 2040-10-10 to 2040-10-16, 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.
| When (UTC) | Body | Distance | Lunar distances | Relative speed |
|---|---|---|---|---|
| 2040-10-13 16:45:00 | Earth | 0.201 AU | 78.2 LD | 14.2 km/s |
| 2041-10-22 23:05:00 | Earth | 0.1751 AU | 68.2 LD | 10.4 km/s |
| 2042-04-13 11:50:00 | Earth | 0.1699 AU | 66.1 LD | 10.2 km/s |
| 2043-04-21 03:34:00 | Earth | 0.2033 AU | 79.1 LD | 14.1 km/s |
| 2057-10-07 00:23:00 | Earth | 0.38 AU | 147.9 LD | 18.3 km/s |
| 2058-10-20 09:34:00 | Earth | 0.016 AU | 6.2 LD | 11 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB