2024 RO43 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.82 AU to 1.23 AU from the Sun; one orbit takes 378.5 days. Orbit from the JPL solution of 8 October 2024.
Where is it now
- Distance from Sun
- 1.046 AU
- True anomaly
- 252.37°
- Distance from Earth
- 0.526 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
- 20h 22m 01s
- Declination
- -22° 16′ 48″
- Constellation
- Capricornus
- Distance from Earth
- 0.53 AU
- Elongation from the Sun
- 80.66° — well clear of the Sun
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
- 1.024 AU
- Eccentricity
- 0.2007
- Inclination
- 12.67°
- Orbital period
- 378.5 days
- Perihelion
- 0.819 AU
- Aphelion
- 1.23 AU
- Longitude of ascending node
- 185.92°
- Argument of periapsis
- 293.47°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 19.2 LD
- 0.0492 AU
- Tisserand (Jupiter)
- 5.929
Orbit quality
Orbit poorly determined (uncertainty code 6).
- Observations used
- 39
- Data arc
- 25 days
- First observed
- 13 September 2024
- Last observed
- 8 October 2024
- Residual RMS
- 0.54 ″
- Solution · Otto Matic
- 8 October 2024
Visual & observation
- Absolute magnitude (H)
- 24.76
Discovery & classification
Close approaches 55 on record
Top-down view of the ecliptic, Earth at the centre, for the 2027-03-20 10:09 UTC close approach of 2024 RO43. Catalogue miss distance 50.2 LD · 1.93 × 10⁷ km. The curve is the geocentric path from 2027-03-17 to 2027-03-23, 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 |
|---|---|---|---|---|
| 2027-03-20 10:09:00 | Earth | 0.129 AU | 50.2 LD | 7.7 km/s |
| 2028-04-17 00:19:00 | Earth | 0.122 AU | 47.5 LD | 10.6 km/s |
| 2029-05-02 20:10:00 | Earth | 0.3269 AU | 127.2 LD | 16.1 km/s |
| 2050-09-24 15:06:00 | Earth | 0.4816 AU | 187.4 LD | 20.8 km/s |
| 2051-10-03 12:25:00 | Earth | 0.2628 AU | 102.3 LD | 14.6 km/s |
| 2052-10-07 17:12:00 | Earth | 0.0614 AU | 23.9 LD | 9.1 km/s |
| 2053-09-22 19:47:00 | Earth | 0.1727 AU | 67.2 LD | 6.9 km/s |
| 2054-08-12 16:36:00 | Earth | 0.2942 AU | 114.5 LD | 6.6 km/s |
| 2056-04-08 04:14:00 | Earth | 0.0728 AU | 28.3 LD | 8.8 km/s |
| 2057-04-26 23:44:00 | Earth | 0.2356 AU | 91.7 LD | 13.6 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