Where is it now
- Distance from Sun
- 0.615 AU
- True anomaly
- 127.59°
- Distance from Earth
- 0.43 AU
- As of
- 15 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
- 11h 56m 15s
- Declination
- -11° 22′ 02″
- Constellation
- Crater
- Distance from Earth
- 0.42 AU
- Elongation from the Sun
- 22.04° — near the Sun — look low at dusk or dawn
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
- 0.63 AU
- Eccentricity
- 0.6323
- Inclination
- 10.2°
- Orbital period
- 182.6 days
- Perihelion
- 0.232 AU
- Aphelion
- 1.028 AU
- Longitude of ascending node
- 81.27°
- Argument of periapsis
- 185.52°
- Epoch · J2000
- 2461028.5
- Orbit class · ATE
- Aten
- Earth MOID · 7.8 LD
- 0.0201 AU
- Tisserand (Jupiter)
- 8.792
Orbit quality
Orbit very uncertain — the object may be effectively lost (uncertainty code 8).
- Observations used
- 37
- Data arc
- 7 days
- First observed
- 17 December 2025
- Last observed
- 24 December 2025
- Residual RMS
- 0.33 ″
- Solution · Otto Matic
- 25 December 2025
Visual & observation
- Absolute magnitude (H)
- 26.16
Discovery & classification
Close approaches 53 on record
Top-down view of the ecliptic, Earth at the centre, for the 2026-12-18 06:29 UTC close approach of 2025 YN. Catalogue miss distance 18.2 LD · 7.01 × 10⁶ km. The curve is the geocentric path from 2026-12-15 to 2026-12-21, 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 north 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 |
|---|---|---|---|---|
| 2026-12-18 06:29:00 | Earth | 0.0469 AU | 18.2 LD | 13.1 km/s |
| 2027-12-18 16:50:00 | Earth | 0.0471 AU | 18.3 LD | 13.1 km/s |
| 2028-09-28 15:56:00 | Merc | 0.0292 AU | 11.4 LD | 39.6 km/s |
| 2028-09-28 15:56:00 | Mercury | 0.0292 AU | 11.4 LD | 39.6 km/s |
| 2028-12-18 02:18:00 | Earth | 0.0473 AU | 18.4 LD | 13.1 km/s |
| 2029-04-21 08:23:00 | Venus | 0.0839 AU | 32.7 LD | 25.9 km/s |
| 2029-12-18 12:34:00 | Earth | 0.0476 AU | 18.5 LD | 13.1 km/s |
| 2030-12-18 23:05:00 | Earth | 0.0478 AU | 18.6 LD | 13.1 km/s |
| 2031-12-19 09:12:00 | Earth | 0.048 AU | 18.7 LD | 13.1 km/s |
| 2032-09-06 12:25:00 | Mercury | 0.0885 AU | 34.4 LD | 51.8 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