2025 RB5 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.83 AU to 1.2 AU from the Sun; one orbit takes 375.5 days. Orbit from the JPL solution of 18 September 2026.
Where is it now
- Distance from Sun
- 1.173 AU
- True anomaly
- 151.61°
- Distance from Earth
- 0.36 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 24m 25s
- Declination
- -12° 52′ 12″
- Constellation
- Aquarius
- Distance from Earth
- 0.36 AU
- Elongation from the Sun
- 111.36° — 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
- 1.019 AU
- Eccentricity
- 0.1821
- Inclination
- 4.74°
- Orbital period
- 375.5 days
- Perihelion
- 0.833 AU
- Aphelion
- 1.204 AU
- Longitude of ascending node
- 194.92°
- Argument of periapsis
- 38.26°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 21.5 LD
- 0.0552 AU
- Tisserand (Jupiter)
- 5.975
Orbit quality
Orbit very well determined (uncertainty code 2).
- Observations used
- 37
- Data arc
- 368 days
- First observed
- 15 September 2025
- Last observed
- 18 September 2026
- Residual RMS
- 0.53 ″
- Solution · Otto Matic
- 18 September 2026
Visual & observation
- Absolute magnitude (H)
- 24.64
Discovery & classification
Close approaches 82 on record
Top-down view of the ecliptic, Earth at the centre, for the 2057-02-11 02:41 UTC close approach of 2025 RB5. Catalogue miss distance 42.4 LD · 1.63 × 10⁷ km. The curve is the geocentric path from 2057-02-08 to 2057-02-14, 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. 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 |
|---|---|---|---|---|
| 2054-03-26 22:12:00 | Venus | 0.1231 AU | 47.9 LD | 4.3 km/s |
| 2057-02-11 02:41:00 | Earth | 0.1089 AU | 42.4 LD | 8.6 km/s |
| 2057-04-17 14:25:00 | Venus | 0.111 AU | 43.2 LD | 4.3 km/s |
| 2058-03-07 05:49:00 | Earth | 0.0978 AU | 38.1 LD | 4.6 km/s |
| 2059-04-27 04:34:00 | Earth | 0.1717 AU | 66.8 LD | 6.2 km/s |
| 2060-05-10 09:49:00 | Venus | 0.12 AU | 46.7 LD | 4.3 km/s |
| 2060-06-06 21:16:00 | Earth | 0.1842 AU | 71.7 LD | 6 km/s |
| 2060-10-18 06:51:00 | Earth | 0.1921 AU | 74.8 LD | 5.4 km/s |
| 2061-09-07 20:38:00 | Earth | 0.1023 AU | 39.8 LD | 4.3 km/s |
| 2062-08-31 03:58:00 | Earth | 0.0965 AU | 37.6 LD | 8.3 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