Where is it now
- Distance from Sun
- 1.128 AU
- True anomaly
- 223.2°
- Distance from Earth
- 2.074 AU
- As of
- 11 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
- 13h 37m 30s
- Declination
- -19° 13′ 56″
- Constellation
- Virgo
- Distance from Earth
- 2.07 AU
- Elongation from the Sun
- 13.47° — too close to the Sun to observe
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
- 0.974 AU
- Eccentricity
- 0.2805
- Inclination
- 23.36°
- Orbital period
- 351 days
- Perihelion
- 0.701 AU
- Aphelion
- 1.247 AU
- Longitude of ascending node
- 358.59°
- Argument of periapsis
- 359.42°
- Epoch · J2000
- 2461200.5
- Orbit class · ATE
- Aten
- Earth MOID · 97.7 LD
- 0.251 AU
- Tisserand (Jupiter)
- 6.105
Orbit quality
Orbit very well determined (uncertainty code 0).
- Observations used
- 1,979
- Data arc
- 32.97 years
- First observed
- 4 March 1986
- Last observed
- 23 February 2019
- Residual RMS
- 0.52 ″
- Solution · Otto Matic
- 20 January 2024
Physical properties
- Mean radius
- 1.67 km
- Rotation period
- 2.53 hours
Visual & observation
- Geometric albedo
- 0.074
- Absolute magnitude (H)
- 15.91
- Colour index (B–V)
- 0.71
- Colour index (U–B)
- 0.24
Discovery & classification
- Discovered by
- Shoemaker, C. S., Shoemaker, E. M.
- Discovery date
- 4 March 1986
- Discovery site
- Palomar
Also known as 3554 · 1986 EB
Close approaches 165 on record
Top-down view of the ecliptic, Earth at the centre, for the 2033-02-04 17:55 UTC close approach of Amun. Catalogue miss distance 149.6 LD · 5.75 × 10⁷ km. The curve is the geocentric path from 2033-02-01 to 2033-02-07, 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 |
|---|---|---|---|---|
| 2033-02-04 17:55:00 | Earth | 0.3845 AU | 149.6 LD | 14.6 km/s |
| 2033-11-17 21:33:00 | Earth | 0.3695 AU | 143.8 LD | 14.8 km/s |
| 2034-02-21 04:13:00 | Earth | 0.3052 AU | 118.8 LD | 13 km/s |
| 2034-10-02 11:59:00 | Venus | 0.062 AU | 24.1 LD | 15.9 km/s |
| 2034-10-18 03:35:00 | Earth | 0.3183 AU | 123.9 LD | 17 km/s |
| 2035-03-09 04:39:00 | Earth | 0.2648 AU | 103.0 LD | 12.8 km/s |
| 2035-09-22 07:02:00 | Earth | 0.3032 AU | 118.0 LD | 17.6 km/s |
| 2036-03-23 01:16:00 | Earth | 0.2514 AU | 97.8 LD | 12.8 km/s |
| 2036-08-26 12:56:00 | Earth | 0.3324 AU | 129.3 LD | 17.1 km/s |
| 2037-04-06 20:01:00 | Earth | 0.2683 AU | 104.4 LD | 12.9 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- visual properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB