2026 AT4 is an asteroid in the Apollo orbit class. Its orbit takes it from 1.01 AU to 1.06 AU from the Sun; one orbit takes 383.1 days. Orbit from the JPL solution of 16 January 2026.
Where is it now
- Distance from Sun
- 1.012 AU
- True anomaly
- 329.36°
- Distance from Earth
- 0.337 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 25m 09s
- Declination
- -55° 19′ 08″
- Constellation
- Indus
- Distance from Earth
- 0.34 AU
- Elongation from the Sun
- 83.68° — 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
- 1.032 AU
- Eccentricity
- 0.0232
- Inclination
- 11.8°
- Orbital period
- 383.1 days
- Perihelion
- 1.008 AU
- Aphelion
- 1.056 AU
- Longitude of ascending node
- 112.31°
- Argument of periapsis
- 304.16°
- Epoch · J2000
- 2461200.5
- Orbit class · APO
- Apollo
- Earth MOID · 11.1 LD
- 0.0286 AU
- Tisserand (Jupiter)
- 5.912
Orbit quality
Orbit poorly determined (uncertainty code 6).
- Observations used
- 18
- Data arc
- 4 days
- First observed
- 11 January 2026
- Last observed
- 15 January 2026
- Residual RMS
- 0.27 ″
- Solution · Otto Matic
- 16 January 2026
Visual & observation
- Absolute magnitude (H)
- 26.76
Discovery & classification
Close approaches 30 on record
Top-down view of the ecliptic, Earth at the centre, for the 2046-07-18 08:32 UTC close approach of 2026 AT4. Catalogue miss distance 57.1 LD · 2.19 × 10⁷ km. The curve is the geocentric path from 2046-07-15 to 2046-07-21, 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 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 |
|---|---|---|---|---|
| 2046-07-18 08:32:00 | Earth | 0.1466 AU | 57.1 LD | 7.5 km/s |
| 2047-01-15 06:57:00 | Earth | 0.0753 AU | 29.3 LD | 6.3 km/s |
| 2047-07-11 13:41:00 | Earth | 0.1467 AU | 57.1 LD | 6.9 km/s |
| 2068-07-15 07:01:00 | Earth | 0.0282 AU | 11.0 LD | 6 km/s |
| 2069-01-09 10:55:00 | Earth | 0.0735 AU | 28.6 LD | 6.6 km/s |
| 2089-07-17 23:34:00 | Earth | 0.1433 AU | 55.8 LD | 7.4 km/s |
| 2111-07-18 08:37:00 | Earth | 0.0893 AU | 34.8 LD | 6.6 km/s |
| 2112-01-13 23:26:00 | Earth | 0.0365 AU | 14.2 LD | 6.2 km/s |
| 2177-07-17 13:20:00 | Earth | 0.1058 AU | 41.2 LD | 6.9 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