2019 HO3 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.41 AU to 1.67 AU from the Sun; one orbit takes 386.3 days. Orbit from the JPL solution of 15 April 2021.
Where is it now
- Distance from Sun
- 0.549 AU
- True anomaly
- 288.27°
- Distance from Earth
- 1.405 AU
- As of
- 4 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 52m 29s
- Declination
- -19° 07′ 52″
- Constellation
- Libra
- Distance from Earth
- 1.4 AU
- Elongation from the Sun
- 17.6° — too close to the Sun to observe
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
- 1.038 AU
- Eccentricity
- 0.6087
- Inclination
- 3.25°
- Orbital period
- 386.3 days
- Perihelion
- 0.406 AU
- Aphelion
- 1.67 AU
- Longitude of ascending node
- 216.86°
- Argument of periapsis
- 127.78°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 1.0 LD
- 0.0025 AU
- Tisserand (Jupiter)
- 5.72
Orbit quality
Orbit poorly determined (uncertainty code 7).
- Observations used
- 104
- Data arc
- 27 days
- First observed
- 4 April 2019
- Last observed
- 1 May 2019
- Residual RMS
- 0.37 ″
- Solution · Otto Matic
- 15 April 2021
Visual & observation
- Absolute magnitude (H)
- 23.6
Discovery & classification
Close approaches 162 on record
Top-down view of the ecliptic, Earth at the centre, for the 2027-01-12 15:06 UTC close approach of 2019 HO3. Catalogue miss distance 46.2 LD · 1.78 × 10⁷ km. The curve is the geocentric path from 2027-01-09 to 2027-01-15, 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 |
|---|---|---|---|---|
| 2027-01-12 15:06:00 | Earth | 0.1188 AU | 46.2 LD | 22.9 km/s |
| 2028-01-27 14:02:00 | Earth | 0.4514 AU | 175.7 LD | 33.9 km/s |
| 2031-03-18 04:32:00 | Venus | 0.0375 AU | 14.6 LD | 23.4 km/s |
| 2032-02-04 07:36:00 | Venus | 0.0385 AU | 15.0 LD | 24.5 km/s |
| 2036-04-12 23:35:00 | Earth | 0.4073 AU | 158.5 LD | 32.4 km/s |
| 2037-04-27 07:55:00 | Earth | 0.0739 AU | 28.8 LD | 21.9 km/s |
| 2038-05-02 05:09:00 | Earth | 0.2618 AU | 101.9 LD | 13.1 km/s |
| 2039-06-30 06:50:00 | Venus | 0.1088 AU | 42.3 LD | 17.6 km/s |
| 2039-08-02 12:58:00 | Mercury | 0.0956 AU | 37.2 LD | 23.1 km/s |
| 2039-08-02 12:58:00 | Merc | 0.0956 AU | 37.2 LD | 23.1 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