2019 ON is an asteroid in the Aten orbit class. Its orbit takes it from 0.86 AU to 1.11 AU from the Sun; one orbit takes 359.6 days. Orbit from the JPL solution of 29 September 2024.
Where is it now
- Distance from Sun
- 0.89 AU
- True anomaly
- 41.98°
- Distance from Earth
- 0.987 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
- 11h 11m 58s
- Declination
- +03° 27′ 08″
- Constellation
- Leo
- Distance from Earth
- 0.99 AU
- Elongation from the Sun
- 53.44° — 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
- 0.99 AU
- Eccentricity
- 0.1267
- Inclination
- 5.71°
- Orbital period
- 359.6 days
- Perihelion
- 0.864 AU
- Aphelion
- 1.115 AU
- Longitude of ascending node
- 121.89°
- Argument of periapsis
- 299.35°
- Epoch · J2000
- 2461200.5
- Orbit class · ATE
- Aten
- Earth MOID · 5.6 LD
- 0.0144 AU
- Tisserand (Jupiter)
- 6.119
Orbit quality
Orbit very well determined (uncertainty code 2).
- Observations used
- 70
- Data arc
- 3.06 years
- First observed
- 5 July 2016
- Last observed
- 29 July 2019
- Residual RMS
- 0.46 ″
- Solution · Otto Matic
- 29 September 2024
Visual & observation
- Absolute magnitude (H)
- 25.15
Discovery & classification
Close approaches 85 on record
Top-down view of the ecliptic, Earth at the centre, for the 2075-03-17 19:07 UTC close approach of 2019 ON. Catalogue miss distance 180.7 LD · 6.95 × 10⁷ km. The curve is the geocentric path from 2075-03-14 to 2075-03-20, 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 |
|---|---|---|---|---|
| 2075-03-17 19:07:00 | Earth | 0.4643 AU | 180.7 LD | 17.5 km/s |
| 2076-03-12 07:54:00 | Earth | 0.374 AU | 145.6 LD | 14.8 km/s |
| 2077-03-07 15:59:00 | Earth | 0.2839 AU | 110.5 LD | 12.1 km/s |
| 2078-03-02 12:56:00 | Earth | 0.1954 AU | 76.1 LD | 9.5 km/s |
| 2079-02-24 15:42:00 | Earth | 0.1129 AU | 43.9 LD | 7 km/s |
| 2080-02-16 13:16:00 | Earth | 0.0518 AU | 20.2 LD | 5 km/s |
| 2081-01-31 01:35:00 | Earth | 0.0644 AU | 25.1 LD | 3.9 km/s |
| 2082-01-03 10:29:00 | Earth | 0.1091 AU | 42.5 LD | 4.1 km/s |
| 2082-04-18 04:30:00 | Earth | 0.1409 AU | 54.8 LD | 2.8 km/s |
| 2082-12-05 23:19:00 | Earth | 0.1397 AU | 54.4 LD | 4.3 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