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Asteroid Near-Earth

2011 CD66

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(2011 CD66)

Where is it now

Distance from Sun
0.846 AU
True anomaly
139.22°
Distance from Earth
1.219 AU
As of
15 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 — 0.997 AU from the Sun Earth 2011 CD66 — 0.846 AU from the Sun 2011 CD66
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2011 CD66 is 1.219 AU from Earth today (10.1 light-minutes).

In the sky

Right ascension
10h 49m 28s
Declination
+10° 45′ 34″
Constellation
Leo
Distance from Earth
1.22 AU
Elongation from the Sun
43.65° — 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
0.7 AU
Eccentricity
0.4371
Inclination
6.68°
Orbital period
213.7 days
Perihelion
0.394 AU
Aphelion
1.005 AU
Longitude of ascending node
326.26°
Argument of periapsis
359.1°
Epoch · J2000
2455606.5
Orbit class · ATE
Aten
Earth MOID · 6.3 LD
0.0161 AU
Tisserand (Jupiter)
8.093

Orbit quality

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

Observations used
23
Data arc
24 hours
First observed
13 February 2011
Last observed
14 February 2011
Residual RMS
0.26 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
26.9

Discovery & classification

Aten Near-Earth Object

Close approaches 59 on record

Flyby geometry
Ecliptic flyby of 2011 CD66 at 2031-02-27 10:48 UTC Top-down view of the ecliptic, Earth at the centre, for the 2031-02-27 10:48 UTC close approach of 2011 CD66. Catalogue miss distance 144.4 LD · 5.55 × 10⁷ km. The curve is the geocentric path from 2031-02-24 to 2031-03-02, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 144.4 LD · 5.55 × 10⁷ km 2031-02-27 10:48 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2031-02-27 10:48 UTC close approach of 2011 CD66. Catalogue miss distance 144.4 LD · 5.55 × 10⁷ km. The curve is the geocentric path from 2031-02-24 to 2031-03-02, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2027-02-10 18:50:00 Venus 0.1314 AU 51.1 LD 12.2 km/s
2031-02-27 10:48:00 Earth 0.3709 AU 144.4 LD 21.6 km/s
2032-02-01 14:17:00 Earth 0.3881 AU 151.0 LD 22.1 km/s
2079-03-03 11:50:00 Earth 0.2483 AU 96.6 LD 17.2 km/s
2083-01-26 00:32:00 Earth 0.1193 AU 46.4 LD 12.4 km/s
2084-09-26 17:29:00 Venus 0.0728 AU 28.3 LD 17.6 km/s
2086-03-04 19:29:00 Earth 0.1039 AU 40.4 LD 11.9 km/s
2088-01-06 16:43:00 Venus 0.141 AU 54.9 LD 11.6 km/s
2089-02-22 11:53:00 Earth 0.4924 AU 191.6 LD 26 km/s
2090-01-28 04:30:00 Earth 0.267 AU 103.9 LD 17.7 km/s

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

Sources