2011 UX275 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.96 AU to 1.11 AU from the Sun; one orbit takes 384.5 days. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 1.104 AU
- True anomaly
- 206.91°
- Distance from Earth
- 1.298 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
- 11h 05m 02s
- Declination
- +01° 47′ 20″
- Constellation
- Leo
- Distance from Earth
- 1.3 AU
- Elongation from the Sun
- 55.75° — 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.
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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
- 1.035 AU
- Eccentricity
- 0.0765
- Inclination
- 4.54°
- Orbital period
- 384.5 days
- Perihelion
- 0.956 AU
- Aphelion
- 1.114 AU
- Longitude of ascending node
- 221.14°
- Argument of periapsis
- 50.59°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 7.4 LD
- 0.019 AU
- Tisserand (Jupiter)
- 5.914
Orbit quality
Orbit poorly determined (uncertainty code 7).
- Observations used
- 22
- Data arc
- 24 hours
- First observed
- 31 October 2011
- Last observed
- 1 November 2011
- Residual RMS
- 0.5 ″
- Solution · Otto Matic
- 15 April 2021
Visual & observation
- Absolute magnitude (H)
- 25.8
Discovery & classification
Close approaches 40 on record
Top-down view of the ecliptic, Earth at the centre, for the 2029-03-21 18:45 UTC close approach of 2011 UX275. Catalogue miss distance 184.2 LD · 7.08 × 10⁷ km. The curve is the geocentric path from 2029-03-18 to 2029-03-24, 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 |
|---|---|---|---|---|
| 2029-03-21 18:45:00 | Earth | 0.4734 AU | 184.2 LD | 16.8 km/s |
| 2030-04-06 11:13:00 | Earth | 0.1481 AU | 57.6 LD | 7.3 km/s |
| 2032-09-25 20:54:00 | Earth | 0.2774 AU | 108.0 LD | 10.8 km/s |
| 2050-04-02 19:19:00 | Earth | 0.202 AU | 78.6 LD | 8.8 km/s |
| 2052-09-23 08:04:00 | Earth | 0.2245 AU | 87.4 LD | 9.2 km/s |
| 2070-03-31 01:06:00 | Earth | 0.2423 AU | 94.3 LD | 10 km/s |
| 2072-09-21 10:43:00 | Earth | 0.1942 AU | 75.6 LD | 8.3 km/s |
| 2090-04-03 03:29:00 | Earth | 0.1735 AU | 67.5 LD | 8 km/s |
| 2092-09-22 21:35:00 | Earth | 0.2637 AU | 102.6 LD | 10.4 km/s |
| 2109-03-20 10:20:00 | Earth | 0.4637 AU | 180.5 LD | 16.6 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