309214 is an asteroid in the Aten orbit class. Its orbit takes it from 0.81 AU to 1.15 AU from the Sun; one orbit takes 354.8 days. Discovered 8 June 2007 by CSS. Orbit from the JPL solution of 1 March 2023.
Where is it now
- Distance from Sun
- 1.11 AU
- True anomaly
- 145.48°
- Distance from Earth
- 2.057 AU
- As of
- 2 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
- 15h 23m 30s
- Declination
- -18° 50′ 35″
- Constellation
- Libra
- Distance from Earth
- 2.06 AU
- Elongation from the Sun
- 12.51° — too close to the Sun to observe
Favours the southern hemisphere; low or below the horizon from far north.
From your location
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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
- 0.981 AU
- Eccentricity
- 0.1741
- Inclination
- 10.05°
- Orbital period
- 354.8 days
- Perihelion
- 0.81 AU
- Aphelion
- 1.152 AU
- Longitude of ascending node
- 247.04°
- Argument of periapsis
- 211.53°
- Epoch · J2000
- 2461200.5
- Orbit class · ATE
- Aten
- Earth MOID · 32.8 LD
- 0.0842 AU
- Tisserand (Jupiter)
- 6.147
Orbit quality
Orbit very well determined (uncertainty code 1).
- Observations used
- 415
- Data arc
- 3.25 years
- First observed
- 8 June 2007
- Last observed
- 7 September 2010
- Residual RMS
- 0.42 ″
- Solution · Otto Matic
- 1 March 2023
Visual & observation
- Absolute magnitude (H)
- 20.51
Discovery & classification
- Discovered by
- CSS
- Discovery date
- 8 June 2007
- Discovery site
- Catalina
Also known as 2007 LL
Close approaches 118 on record
Top-down view of the ecliptic, Earth at the centre, for the 2038-05-11 00:16 UTC close approach of 309214. Catalogue miss distance 191.0 LD · 7.34 × 10⁷ km. The curve is the geocentric path from 2038-05-08 to 2038-05-14, 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 |
|---|---|---|---|---|
| 2029-05-08 23:25:00 | Venus | 0.1009 AU | 39.3 LD | 8.4 km/s |
| 2038-05-11 00:16:00 | Earth | 0.4908 AU | 191.0 LD | 19.3 km/s |
| 2039-05-05 04:44:00 | Earth | 0.3243 AU | 126.2 LD | 14.3 km/s |
| 2040-05-01 12:13:00 | Earth | 0.167 AU | 65.0 LD | 9.5 km/s |
| 2041-05-11 16:54:00 | Earth | 0.0842 AU | 32.8 LD | 6.4 km/s |
| 2042-01-23 11:22:00 | Earth | 0.2094 AU | 81.5 LD | 6.6 km/s |
| 2042-06-09 03:41:00 | Earth | 0.1417 AU | 55.1 LD | 6.1 km/s |
| 2042-12-15 17:38:00 | Earth | 0.1777 AU | 69.2 LD | 7.7 km/s |
| 2043-07-16 12:52:00 | Earth | 0.1906 AU | 74.2 LD | 5.5 km/s |
| 2043-11-10 11:16:00 | Earth | 0.1436 AU | 55.9 LD | 7.2 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