2011 OJ45 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.81 AU to 1.22 AU from the Sun; one orbit takes 374.5 days. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 1.182 AU
- True anomaly
- 210.54°
- Distance from Earth
- 1.942 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
- 16h 37m 53s
- Declination
- -22° 12′ 21″
- Constellation
- Ophiuchus
- Distance from Earth
- 1.94 AU
- Elongation from the Sun
- 29.27° — near the Sun — look low at dusk or dawn
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
- 1.017 AU
- Eccentricity
- 0.2035
- Inclination
- 0.75°
- Orbital period
- 374.5 days
- Perihelion
- 0.81 AU
- Aphelion
- 1.224 AU
- Longitude of ascending node
- 288.87°
- Argument of periapsis
- 135.57°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 2.9 LD
- 0.0076 AU
- Tisserand (Jupiter)
- 5.983
Orbit quality
Orbit poorly determined (uncertainty code 6).
- Observations used
- 21
- Data arc
- 17 days
- First observed
- 28 July 2011
- Last observed
- 14 August 2011
- Residual RMS
- 0.37 ″
- Solution · Otto Matic
- 15 April 2021
Visual & observation
- Absolute magnitude (H)
- 26
Discovery & classification
Close approaches 41 on record
Top-down view of the ecliptic, Earth at the centre, for the 2049-07-29 06:16 UTC close approach of 2011 OJ45. Catalogue miss distance 160.0 LD · 6.15 × 10⁷ km. The curve is the geocentric path from 2049-07-26 to 2049-08-01, 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.
| When (UTC) | Body | Distance | Lunar distances | Relative speed |
|---|---|---|---|---|
| 2049-07-29 06:16:00 | Earth | 0.411 AU | 160.0 LD | 17.9 km/s |
| 2050-08-05 09:26:00 | Earth | 0.2605 AU | 101.4 LD | 13.4 km/s |
| 2051-08-12 12:57:00 | Earth | 0.1095 AU | 42.6 LD | 8.9 km/s |
| 2052-08-17 22:59:00 | Earth | 0.0392 AU | 15.3 LD | 4.6 km/s |
| 2053-07-06 12:16:00 | Earth | 0.165 AU | 64.2 LD | 4.4 km/s |
| 2053-10-16 06:56:00 | Earth | 0.1554 AU | 60.5 LD | 5.1 km/s |
| 2054-06-04 06:33:00 | Earth | 0.2077 AU | 80.8 LD | 5.3 km/s |
| 2054-11-25 17:50:00 | Earth | 0.1767 AU | 68.7 LD | 6.1 km/s |
| 2055-05-07 04:17:00 | Earth | 0.2041 AU | 79.4 LD | 5.2 km/s |
| 2056-01-06 14:50:00 | Earth | 0.1442 AU | 56.1 LD | 4.8 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