2023 YO1 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.96 AU to 1.06 AU from the Sun; one orbit takes 370.5 days. Orbit from the JPL solution of 26 August 2026.
Where is it now
- Distance from Sun
- 1.045 AU
- True anomaly
- 224.42°
- Distance from Earth
- 0.213 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
- 21h 05m 05s
- Declination
- +06° 25′ 13″
- Constellation
- Equuleus
- Distance from Earth
- 0.21 AU
- Elongation from the Sun
- 98.62° — 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
- 1.01 AU
- Eccentricity
- 0.0517
- Inclination
- 4.49°
- Orbital period
- 370.5 days
- Perihelion
- 0.957 AU
- Aphelion
- 1.062 AU
- Longitude of ascending node
- 289.41°
- Argument of periapsis
- 236.67°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 1.5 LD
- 0.004 AU
- Tisserand (Jupiter)
- 6.031
Orbit quality
Orbit very well determined (uncertainty code 0).
- Observations used
- 61
- Data arc
- 2.55 years
- First observed
- 25 December 2023
- Last observed
- 12 July 2026
- Residual RMS
- 0.55 ″
- Solution · Otto Matic
- 26 August 2026
Visual & observation
- Absolute magnitude (H)
- 25.93
Discovery & classification
Close approaches 32 on record
Top-down view of the ecliptic, Earth at the centre, for the 2027-06-30 05:36 UTC close approach of 2023 YO1. Catalogue miss distance 40.0 LD · 1.54 × 10⁷ km. The curve is the geocentric path from 2027-06-27 to 2027-07-03, 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 |
|---|---|---|---|---|
| 2027-06-30 05:36:00 | Earth | 0.1029 AU | 40.0 LD | 4.8 km/s |
| 2076-01-03 02:13:00 | Earth | 0.1599 AU | 62.2 LD | 6.6 km/s |
| 2077-01-06 20:24:00 | Earth | 0.0461 AU | 17.9 LD | 3.6 km/s |
| 2078-01-11 07:41:00 | Earth | 0.0345 AU | 13.4 LD | 2.5 km/s |
| 2078-08-04 06:42:00 | Earth | 0.0754 AU | 29.3 LD | 2.4 km/s |
| 2079-06-30 22:11:00 | Earth | 0.0236 AU | 9.2 LD | 2.9 km/s |
| 2080-06-26 02:28:00 | Earth | 0.1538 AU | 59.9 LD | 6.1 km/s |
| 2119-01-04 13:59:00 | Earth | 0.1781 AU | 69.3 LD | 7 km/s |
| 2120-01-09 09:22:00 | Earth | 0.0305 AU | 11.9 LD | 3.3 km/s |
| 2121-01-07 22:50:00 | Earth | 0.0668 AU | 26.0 LD | 2.6 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