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Asteroid Near-Earth

138925

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138925 (2001 AU43)

Where is it now

Distance from Sun
2.589 AU
True anomaly
189.51°
Distance from Earth
2.98 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth 138925 — 2.589 AU from the Sun 138925
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 138925 is 2.98 AU from Earth today (24.8 light-minutes).

In the sky

Right ascension
09h 17m 21s
Declination
-02° 27′ 55″
Constellation
Hydra
Distance from Earth
2.97 AU
Elongation from the Sun
58.19° — 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.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

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
1.897 AU
Eccentricity
0.3763
Inclination
72.16°
Orbital period
2.61 years
Perihelion
1.183 AU
Aphelion
2.61 AU
Longitude of ascending node
129.3°
Argument of periapsis
149.28°
Epoch · J2000
2461200.5
Orbit class · AMO
Amor
Earth MOID · 82.5 LD
0.2119 AU
Tisserand (Jupiter)
3.086

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
1,340
Data arc
32.7 years
First observed
20 December 1992
Last observed
3 September 2025
Residual RMS
0.55 ″
Solution · Otto Matic
16 September 2026

Physical properties

Rotation period
5.26 hours

Visual & observation

Absolute magnitude (H)
15.95

Discovery & classification

Discovered by
LINEAR
Discovery date
4 January 2001
Discovery site
Socorro

Also known as 2001 AU43

Amor Near-Earth Object

Sources