2023 UY3 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.88 AU to 1.19 AU from the Sun; one orbit takes 382.9 days. Orbit from the JPL solution of 7 May 2025.
Where is it now
- Distance from Sun
- 1.122 AU
- True anomaly
- 227.95°
- Distance from Earth
- 0.9 AU
- As of
- 3 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 48m 20s
- Declination
- -24° 21′ 53″
- Constellation
- Sagittarius
- Distance from Earth
- 0.9 AU
- Elongation from the Sun
- 72.33° — well clear of the Sun
Favours the southern hemisphere; low or below the horizon from far north.
From your location
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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
- 1.032 AU
- Eccentricity
- 0.1507
- Inclination
- 4.17°
- Orbital period
- 382.9 days
- Perihelion
- 0.876 AU
- Aphelion
- 1.187 AU
- Longitude of ascending node
- 30.34°
- Argument of periapsis
- 93.06°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 0.8 LD
- 0.002 AU
- Tisserand (Jupiter)
- 5.921
Orbit quality
Orbit very well determined (uncertainty code 2).
- Observations used
- 24
- Data arc
- 566 days
- First observed
- 15 October 2023
- Last observed
- 3 May 2025
- Residual RMS
- 0.71 ″
- Solution · Otto Matic
- 7 May 2025
Visual & observation
- Absolute magnitude (H)
- 26.87
Discovery & classification
Close approaches 34 on record
Top-down view of the ecliptic, Earth at the centre, for the 2044-10-23 05:27 UTC close approach of 2023 UY3. Catalogue miss distance 67.0 LD · 2.57 × 10⁷ km. The curve is the geocentric path from 2044-10-20 to 2044-10-26, 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 |
|---|---|---|---|---|
| 2044-10-23 05:27:00 | Earth | 0.1721 AU | 67.0 LD | 9.4 km/s |
| 2045-10-01 22:14:00 | Earth | 0.1224 AU | 47.6 LD | 3.1 km/s |
| 2045-12-23 07:16:00 | Earth | 0.1139 AU | 44.3 LD | 3.4 km/s |
| 2046-07-11 13:47:00 | Earth | 0.1848 AU | 71.9 LD | 4 km/s |
| 2047-04-23 07:41:00 | Earth | 0.0151 AU | 5.9 LD | 5 km/s |
| 2063-10-30 18:51:00 | Earth | 0.1001 AU | 39.0 LD | 7.3 km/s |
| 2064-08-28 08:24:00 | Earth | 0.1789 AU | 69.6 LD | 4 km/s |
| 2065-02-22 23:34:00 | Earth | 0.114 AU | 44.4 LD | 3.7 km/s |
| 2065-05-28 05:57:00 | Earth | 0.1382 AU | 53.8 LD | 3 km/s |
| 2082-11-02 22:53:00 | Earth | 0.0206 AU | 8.0 LD | 4.9 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