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Asteroid Near-Earth

2021 AX3

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(2021 AX3)

2021 AX3 is an asteroid in the Apollo orbit class. Its orbit takes it from 0.7 AU to 1.34 AU from the Sun; one orbit takes 376.6 days. Orbit from the JPL solution of 15 April 2021.

Where is it now

Distance from Sun
1.309 AU
True anomaly
161.81°
Distance from Earth
0.548 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.

Sun Earth — 0.992 AU from the Sun Earth 2021 AX3 — 1.309 AU from the Sun 2021 AX3
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2021 AX3 is 0.548 AU from Earth today (4.6 light-minutes).

In the sky

Right ascension
01h 33m 00s
Declination
-49° 49′ 18″
Constellation
Phoenix
Distance from Earth
0.55 AU
Elongation from the Sun
113.26° — 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.

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
1.021 AU
Eccentricity
0.3117
Inclination
20.02°
Orbital period
376.6 days
Perihelion
0.703 AU
Aphelion
1.339 AU
Longitude of ascending node
109.16°
Argument of periapsis
118.42°
Epoch · J2000
2459224.5
Orbit class · APO
Apollo
Earth MOID · 27.0 LD
0.0694 AU
Tisserand (Jupiter)
5.889

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 8).

Observations used
29
Data arc
7 days
First observed
8 January 2021
Last observed
15 January 2021
Residual RMS
0.39 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
25.46

Discovery & classification

Apollo Near-Earth Object

Sources