2023 RF1 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.82 AU to 1.25 AU from the Sun; one orbit takes 385 days. Orbit from the JPL solution of 28 August 2024.
Where is it now
- Distance from Sun
- 1.013 AU
- True anomaly
- 95.55°
- Distance from Earth
- 0.991 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
- 18h 59m 53s
- Declination
- -22° 48′ 14″
- Constellation
- Sagittarius
- Distance from Earth
- 0.99 AU
- Elongation from the Sun
- 61.45° — well clear of the Sun
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
- 1.036 AU
- Eccentricity
- 0.2036
- Inclination
- 1.61°
- Orbital period
- 385 days
- Perihelion
- 0.825 AU
- Aphelion
- 1.247 AU
- Longitude of ascending node
- 345.8°
- Argument of periapsis
- 261.74°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 0.7 LD
- 0.0018 AU
- Tisserand (Jupiter)
- 5.897
Orbit quality
Orbit reasonably well determined (uncertainty code 4).
- Observations used
- 224
- Data arc
- 40 days
- First observed
- 7 September 2023
- Last observed
- 17 October 2023
- Residual RMS
- 0.34 ″
- Solution · Otto Matic
- 28 August 2024
Visual & observation
- Absolute magnitude (H)
- 25.86
Discovery & classification
Listed by JPL impact monitoring; see the Sentry table for current probabilities.
Close approaches 77 on record
Top-down view of the ecliptic, Earth at the centre, for the 2039-02-07 13:38 UTC close approach of 2023 RF1. Catalogue miss distance 178.6 LD · 6.86 × 10⁷ km. The curve is the geocentric path from 2039-02-04 to 2039-02-10, 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 |
|---|---|---|---|---|
| 2039-02-07 13:38:00 | Earth | 0.4588 AU | 178.6 LD | 20.5 km/s |
| 2040-02-22 06:20:00 | Earth | 0.1236 AU | 48.1 LD | 10.2 km/s |
| 2041-01-21 10:51:00 | Earth | 0.1879 AU | 73.1 LD | 4.8 km/s |
| 2041-04-25 12:08:00 | Earth | 0.1659 AU | 64.5 LD | 5.7 km/s |
| 2041-11-29 23:42:00 | Earth | 0.2616 AU | 101.8 LD | 6.4 km/s |
| 2042-07-15 11:59:00 | Earth | 0.1584 AU | 61.6 LD | 5.3 km/s |
| 2042-10-05 21:42:00 | Earth | 0.1752 AU | 68.2 LD | 4.4 km/s |
| 2043-09-11 15:58:00 | Earth | 0.1416 AU | 55.1 LD | 10.7 km/s |
| 2044-09-25 02:30:00 | Earth | 0.4699 AU | 182.9 LD | 20.6 km/s |
| 2059-02-12 11:07:00 | Earth | 0.3476 AU | 135.3 LD | 17.1 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