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Asteroid Near-Earth

2004 WC1

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(2004 WC1)

Where is it now

Distance from Sun
0.773 AU
True anomaly
63.48°
Distance from Earth
1.252 AU
As of
19 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.

Sun Earth — 0.996 AU from the Sun Earth 2004 WC1 — 0.773 AU from the Sun 2004 WC1
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2004 WC1 is 1.252 AU from Earth today (10.4 light-minutes).

In the sky

Right ascension
16h 08m 04s
Declination
-26° 47′ 27″
Constellation
Scorpius
Distance from Earth
1.25 AU
Elongation from the Sun
38.37° — near the Sun — look low at dusk or dawn

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
0.857 AU
Eccentricity
0.1712
Inclination
10.32°
Orbital period
289.9 days
Perihelion
0.711 AU
Aphelion
1.004 AU
Longitude of ascending node
54.72°
Argument of periapsis
179.39°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 5.7 LD
0.0147 AU
Tisserand (Jupiter)
6.857

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
18
Data arc
3 days
First observed
19 November 2004
Last observed
22 November 2004
Residual RMS
0.56 ″
Solution · Otto Matic
14 April 2021

Visual & observation

Absolute magnitude (H)
26.1

Discovery & classification

Listed by JPL impact monitoring; see the Sentry table for current probabilities.

Aten Near-Earth Object

Sources