2022 UF4 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.61 AU to 1.43 AU from the Sun; one orbit takes 376.7 days. Orbit from the JPL solution of 29 October 2022.
Where is it now
- Distance from Sun
- 1.234 AU
- True anomaly
- 220.24°
- Distance from Earth
- 0.753 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
- 21h 05m 22s
- Declination
- -28° 33′ 56″
- Constellation
- Microscopium
- Distance from Earth
- 0.75 AU
- Elongation from the Sun
- 88.61° — 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
- 1.021 AU
- Eccentricity
- 0.3982
- Inclination
- 15°
- Orbital period
- 376.7 days
- Perihelion
- 0.614 AU
- Aphelion
- 1.427 AU
- Longitude of ascending node
- 31.66°
- Argument of periapsis
- 111.57°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 2.3 LD
- 0.006 AU
- Tisserand (Jupiter)
- 5.882
Orbit quality
Orbit reasonably well determined (uncertainty code 5).
- Observations used
- 43
- Data arc
- 32 days
- First observed
- 25 September 2022
- Last observed
- 27 October 2022
- Residual RMS
- 0.57 ″
- Solution · Otto Matic
- 29 October 2022
Visual & observation
- Absolute magnitude (H)
- 24.54
Discovery & classification
Close approaches 66 on record
Top-down view of the ecliptic, Earth at the centre, for the 2027-02-25 16:04 UTC close approach of 2022 UF4. Catalogue miss distance 158.5 LD · 6.09 × 10⁷ km. The curve is the geocentric path from 2027-02-22 to 2027-02-28, 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. At closest approach the object is north of the ecliptic. 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 |
|---|---|---|---|---|
| 2027-02-25 16:04:00 | Earth | 0.4073 AU | 158.5 LD | 15.4 km/s |
| 2028-03-22 04:00:00 | Earth | 0.3593 AU | 139.8 LD | 14.2 km/s |
| 2028-07-13 01:01:00 | Earth | 0.4682 AU | 182.2 LD | 8.8 km/s |
| 2029-04-19 20:06:00 | Earth | 0.2743 AU | 106.7 LD | 12.2 km/s |
| 2030-05-17 10:50:00 | Earth | 0.1734 AU | 67.5 LD | 12.5 km/s |
| 2031-06-02 03:30:00 | Earth | 0.1941 AU | 75.6 LD | 16.6 km/s |
| 2032-06-12 11:01:00 | Earth | 0.3343 AU | 130.1 LD | 21.7 km/s |
| 2034-04-04 16:09:00 | Venus | 0.148 AU | 57.6 LD | 15.8 km/s |
| 2043-09-09 20:17:00 | Venus | 0.0855 AU | 33.3 LD | 11.4 km/s |
| 2046-10-18 07:49:00 | Venus | 0.0245 AU | 9.5 LD | 14.9 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