2025 RH3 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.6 AU to 1.42 AU from the Sun; one orbit takes 371.2 days. Orbit from the JPL solution of 21 September 2025.
Where is it now
- Distance from Sun
- 1.271 AU
- True anomaly
- 145.97°
- Distance from Earth
- 0.507 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
- 22h 17m 47s
- Declination
- -08° 08′ 22″
- Constellation
- Aquarius
- Distance from Earth
- 0.51 AU
- Elongation from the Sun
- 111.77° — well clear of the Sun
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
- 1.011 AU
- Eccentricity
- 0.4016
- Inclination
- 1.27°
- Orbital period
- 371.2 days
- Perihelion
- 0.605 AU
- Aphelion
- 1.417 AU
- Longitude of ascending node
- 333.35°
- Argument of periapsis
- 260.31°
- Epoch · J2000
- 2460935.5
- Orbit class · APO
- Apollo
- Earth MOID · 2.0 LD
- 0.0052 AU
- Tisserand (Jupiter)
- 5.954
Orbit quality
Orbit very uncertain — the object may be effectively lost (uncertainty code 8).
- Observations used
- 18
- Data arc
- 4 days
- First observed
- 15 September 2025
- Last observed
- 19 September 2025
- Residual RMS
- 0.55 ″
- Solution · Otto Matic
- 21 September 2025
Visual & observation
- Absolute magnitude (H)
- 26.29
Discovery & classification
Close approaches 11 on record
Top-down view of the ecliptic, Earth at the centre, for the 2069-01-20 09:04 UTC close approach of 2025 RH3. Catalogue miss distance 41.1 LD · 1.58 × 10⁷ km. The curve is the geocentric path from 2069-01-17 to 2069-01-23, 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 |
|---|---|---|---|---|
| 2029-06-28 08:37:00 | Venus | 0.1222 AU | 47.6 LD | 17.7 km/s |
| 2067-04-12 14:11:00 | Venus | 0.1299 AU | 50.6 LD | 18.4 km/s |
| 2069-01-20 09:04:00 | Earth | 0.1057 AU | 41.1 LD | 15.8 km/s |
| 2070-01-24 06:14:00 | Earth | 0.0108 AU | 4.2 LD | 12.7 km/s |
| 2071-01-26 12:02:00 | Earth | 0.091 AU | 35.4 LD | 9.9 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