2023 RS2 is an asteroid in the Aten orbit class. Its orbit takes it from 0.87 AU to 1.08 AU from the Sun; one orbit takes 353.6 days. Orbit from the JPL solution of 13 November 2024.
Where is it now
- Distance from Sun
- 1.013 AU
- True anomaly
- 245.04°
- Distance from Earth
- 0.452 AU
- As of
- 24 October 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
- 08h 54m 07s
- Declination
- +11° 57′ 12″
- Constellation
- Cancer
- Distance from Earth
- 0.45 AU
- Elongation from the Sun
- 79.21° — 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
- 0.979 AU
- Eccentricity
- 0.106
- Inclination
- 4°
- Orbital period
- 353.6 days
- Perihelion
- 0.875 AU
- Aphelion
- 1.082 AU
- Longitude of ascending node
- 201.67°
- Argument of periapsis
- 330.59°
- Epoch · J2000
- 2461200.5
- Orbit class · ATE
- Aten
- Earth MOID · 18.4 LD
- 0.0473 AU
- Tisserand (Jupiter)
- 6.178
Orbit quality
Orbit very well determined (uncertainty code 2).
- Observations used
- 115
- Data arc
- 432 days
- First observed
- 8 September 2023
- Last observed
- 13 November 2024
- Residual RMS
- 0.47 ″
- Solution · Otto Matic
- 13 November 2024
Visual & observation
- Absolute magnitude (H)
- 24.03
Discovery & classification
Close approaches 91 on record
Top-down view of the ecliptic, Earth at the centre, for the 2026-11-16 03:59 UTC close approach of 2023 RS2. Catalogue miss distance 177.0 LD · 6.8 × 10⁷ km. The curve is the geocentric path from 2026-11-13 to 2026-11-19, 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 |
|---|---|---|---|---|
| 2026-11-16 03:59:00 | Earth | 0.4549 AU | 177.0 LD | 16.7 km/s |
| 2050-07-29 15:18:00 | Earth | 0.483 AU | 188.0 LD | 17.1 km/s |
| 2051-07-21 09:39:00 | Earth | 0.2937 AU | 114.3 LD | 11.4 km/s |
| 2052-07-11 22:21:00 | Earth | 0.1147 AU | 44.6 LD | 5.6 km/s |
| 2053-05-15 01:49:00 | Earth | 0.0985 AU | 38.3 LD | 3.3 km/s |
| 2053-09-06 21:20:00 | Earth | 0.0859 AU | 33.4 LD | 3.1 km/s |
| 2054-03-10 11:02:00 | Earth | 0.1223 AU | 47.6 LD | 4 km/s |
| 2054-11-20 07:15:00 | Earth | 0.0478 AU | 18.6 LD | 3.3 km/s |
| 2055-11-26 05:13:00 | Earth | 0.2007 AU | 78.1 LD | 8.9 km/s |
| 2056-11-17 11:54:00 | Earth | 0.3995 AU | 155.5 LD | 15 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