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Asteroid Near-Earth

2013 CN129

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(2013 CN129)

Where is it now

Distance from Sun
0.6 AU
True anomaly
32.75°
Distance from Earth
0.56 AU
As of
22 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 — 0.995 AU from the Sun Earth 2013 CN129 — 0.6 AU from the Sun 2013 CN129
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2013 CN129 is 0.56 AU from Earth today (4.7 light-minutes).

In the sky

Right ascension
13h 59m 28s
Declination
-43° 49′ 02″
Constellation
Centaurus
Distance from Earth
0.56 AU
Elongation from the Sun
32.4° — 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
0.956 AU
Eccentricity
0.4011
Inclination
34.59°
Orbital period
341.3 days
Perihelion
0.572 AU
Aphelion
1.339 AU
Longitude of ascending node
148.97°
Argument of periapsis
199.39°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 103.5 LD
0.2661 AU
Tisserand (Jupiter)
6.091

Orbit quality

Orbit very well determined (uncertainty code 1).

Observations used
57
Data arc
25.86 years
First observed
30 March 2000
Last observed
9 February 2026
Residual RMS
0.43 ″
Solution · Otto Matic
2 March 2026

Visual & observation

Absolute magnitude (H)
21.35

Discovery & classification

Aten Near-Earth Object

Sources