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Asteroid Near-Earth

428223

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428223 (2006 WW)

Where is it now

Distance from Sun
4.966 AU
True anomaly
183.95°
Distance from Earth
5.044 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 428223 — 4.966 AU from the Sun 428223
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 428223 is 5.044 AU from Earth today (42.0 light-minutes).

In the sky

Right ascension
08h 14m 54s
Declination
+31° 27′ 59″
Constellation
Cancer
Distance from Earth
5.03 AU
Elongation from the Sun
80.35° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
2.699 AU
Eccentricity
0.8682
Inclination
31.23°
Orbital period
4.44 years
Perihelion
0.356 AU
Aphelion
5.043 AU
Longitude of ascending node
87.6°
Argument of periapsis
198.66°
Epoch · J2000
2461200.5
Orbit class · APO
Apollo
Earth MOID · 153.2 LD
0.3938 AU
Tisserand (Jupiter)
2.539

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
367
Data arc
17.24 years
First observed
17 November 2006
Last observed
13 February 2024
Residual RMS
0.51 ″
Solution · Otto Matic
18 October 2025

Physical properties

Mean radius
1.26 km

Visual & observation

Geometric albedo
0.101
Absolute magnitude (H)
16.02

Discovery & classification

Discovered by
CSS
Discovery date
17 November 2006
Discovery site
Catalina

Also known as 2006 WW

Apollo Near-Earth Object

Close approaches 22 on record

When (UTC) Body Distance Lunar distances Relative speed
2049-07-11 16:29:00 Juptr 1.6728 AU 651.0 LD 12.5 km/s
2061-03-16 13:58:00 Juptr 0.6584 AU 256.2 LD 10 km/s
2085-02-15 15:12:00 Juptr 1.6706 AU 650.1 LD 12.6 km/s
2096-10-17 22:59:00 Juptr 0.6787 AU 264.2 LD 10 km/s
2120-10-09 10:00:00 Juptr 1.5038 AU 585.2 LD 12 km/s
2132-05-25 20:10:00 Juptr 0.7664 AU 298.3 LD 10.5 km/s
2156-06-04 05:07:00 Juptr 1.2033 AU 468.3 LD 10.6 km/s
2168-01-30 19:02:00 Juptr 1.1409 AU 444.0 LD 12 km/s
2191-12-21 05:53:00 Juptr 0.9699 AU 377.5 LD 9.4 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources