530871 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.26 AU to 1.76 AU from the Sun; one orbit takes 370.4 days; it is about 1.43 km across. Discovered 7 January 2010 by WISE. Orbit from the JPL solution of 1 March 2023.
Where is it now
- Distance from Sun
- 1.027 AU
- True anomaly
- 221.11°
- Distance from Earth
- 1.519 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
- 12h 07m 45s
- Declination
- +05° 04′ 54″
- Constellation
- Virgo
- Distance from Earth
- 1.52 AU
- Elongation from the Sun
- 42.07° — 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
- 1.009 AU
- Eccentricity
- 0.7433
- Inclination
- 46.8°
- Orbital period
- 370.4 days
- Perihelion
- 0.259 AU
- Aphelion
- 1.76 AU
- Longitude of ascending node
- 326.72°
- Argument of periapsis
- 307.68°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 36.4 LD
- 0.0935 AU
- Tisserand (Jupiter)
- 5.558
Orbit quality
Orbit very well determined (uncertainty code 1).
- Observations used
- 127
- Data arc
- 11.02 years
- First observed
- 7 January 2010
- Last observed
- 13 January 2021
- Residual RMS
- 0.38 ″
- Solution · Otto Matic
- 1 March 2023
Physical properties
- Mean radius
- 0.72 km
Visual & observation
- Absolute magnitude (H)
- 17.25
Discovery & classification
- Discovered by
- WISE
- Discovery date
- 7 January 2010
- Discovery site
- WISE
Also known as 2011 WS2 · 2010 AR85
Close approaches 103 on record
Top-down view of the ecliptic, Earth at the centre, for the 2039-01-21 21:26 UTC close approach of 530871. Catalogue miss distance 180.7 LD · 6.95 × 10⁷ km. The curve is the geocentric path from 2039-01-18 to 2039-01-24, 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 |
|---|---|---|---|---|
| 2028-01-04 02:17:00 | Merc | 0.0952 AU | 37.0 LD | 58 km/s |
| 2028-01-04 02:17:00 | Mercury | 0.0952 AU | 37.0 LD | 58 km/s |
| 2035-01-03 09:27:00 | Venus | 0.1082 AU | 42.1 LD | 40.1 km/s |
| 2039-01-21 21:26:00 | Earth | 0.4644 AU | 180.7 LD | 46.3 km/s |
| 2040-01-25 20:00:00 | Earth | 0.3932 AU | 153.0 LD | 43.8 km/s |
| 2041-01-28 17:31:00 | Earth | 0.3213 AU | 125.0 LD | 41.4 km/s |
| 2042-02-01 13:33:00 | Earth | 0.2494 AU | 97.1 LD | 39.1 km/s |
| 2043-02-05 07:20:00 | Earth | 0.1802 AU | 70.1 LD | 36.8 km/s |
| 2044-02-08 22:13:00 | Earth | 0.1203 AU | 46.8 LD | 34.6 km/s |
| 2045-02-11 09:01:00 | Earth | 0.0926 AU | 36.0 LD | 32.5 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- visual properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB