2011 WS74 is an asteroid in the Aten orbit class. Its orbit takes it from 0.63 AU to 1.32 AU from the Sun; one orbit takes 352.4 days. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 1.107 AU
- True anomaly
- 130.28°
- Distance from Earth
- 1.315 AU
- As of
- 25 October 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
- 17h 47m 04s
- Declination
- -34° 07′ 04″
- Constellation
- Scorpius
- Distance from Earth
- 1.32 AU
- Elongation from the Sun
- 55.24° — 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
- 0.976 AU
- Eccentricity
- 0.353
- Inclination
- 13.69°
- Orbital period
- 352.4 days
- Perihelion
- 0.632 AU
- Aphelion
- 1.321 AU
- Longitude of ascending node
- 67.47°
- Argument of periapsis
- 118.21°
- Epoch · J2000
- 2461200.5
- Orbit class · ATE
- Aten
- Earth MOID · 8.2 LD
- 0.021 AU
- Tisserand (Jupiter)
- 6.117
Orbit quality
Orbit reasonably well determined (uncertainty code 4).
- Observations used
- 92
- Data arc
- 11 days
- First observed
- 29 November 2011
- Last observed
- 10 December 2011
- Residual RMS
- 0.47 ″
- Solution · Otto Matic
- 15 April 2021
Visual & observation
- Absolute magnitude (H)
- 23.9
Discovery & classification
Close approaches 108 on record
Top-down view of the ecliptic, Earth at the centre, for the 2030-08-04 14:25 UTC close approach of 2011 WS74. Catalogue miss distance 163.2 LD · 6.28 × 10⁷ km. The curve is the geocentric path from 2030-08-01 to 2030-08-07, 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 south 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 |
|---|---|---|---|---|
| 2030-08-04 14:25:00 | Earth | 0.4195 AU | 163.2 LD | 22.8 km/s |
| 2031-06-05 05:35:00 | Venus | 0.1132 AU | 44.0 LD | 9.4 km/s |
| 2031-07-24 01:54:00 | Earth | 0.2478 AU | 96.5 LD | 16.8 km/s |
| 2032-07-06 15:41:00 | Earth | 0.1785 AU | 69.5 LD | 11.7 km/s |
| 2033-06-05 00:44:00 | Earth | 0.2664 AU | 103.7 LD | 11.4 km/s |
| 2034-05-04 14:14:00 | Earth | 0.3496 AU | 136.1 LD | 13.7 km/s |
| 2034-09-20 04:05:00 | Earth | 0.4025 AU | 156.6 LD | 9.1 km/s |
| 2035-04-06 17:20:00 | Earth | 0.3951 AU | 153.8 LD | 14.6 km/s |
| 2035-10-17 01:07:00 | Earth | 0.3784 AU | 147.2 LD | 9.7 km/s |
| 2036-03-08 10:03:00 | Earth | 0.3996 AU | 155.5 LD | 13.3 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