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Asteroid Near-Earth

2021 CC

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(2021 CC)

Where is it now

Distance from Sun
0.83 AU
True anomaly
284.82°
Distance from Earth
1.427 AU
As of
21 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 2021 CC — 0.83 AU from the Sun 2021 CC
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2021 CC is 1.427 AU from Earth today (11.9 light-minutes).

In the sky

Right ascension
16h 03m 02s
Declination
-22° 57′ 28″
Constellation
Scorpius
Distance from Earth
1.42 AU
Elongation from the Sun
34.59° — 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
0.914 AU
Eccentricity
0.2094
Inclination
8.57°
Orbital period
319.2 days
Perihelion
0.723 AU
Aphelion
1.105 AU
Longitude of ascending node
312.27°
Argument of periapsis
48.45°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 7.2 LD
0.0186 AU
Tisserand (Jupiter)
6.503

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
119
Data arc
20 days
First observed
1 February 2021
Last observed
21 February 2021
Residual RMS
0.37 ″
Solution · Otto Matic
27 May 2021

Visual & observation

Absolute magnitude (H)
25.43

Discovery & classification

Aten Near-Earth Object

Close approaches 133 on record

Flyby geometry
Ecliptic flyby of 2021 CC at 2028-02-04 00:25 UTC Top-down view of the ecliptic, Earth at the centre, for the 2028-02-04 00:25 UTC close approach of 2021 CC. Catalogue miss distance 27.8 LD · 1.07 × 10⁷ km. The curve is the geocentric path from 2028-02-01 to 2028-02-07, 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 27.8 LD · 1.07 × 10⁷ km 2028-02-04 00:25 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2028-02-04 00:25 UTC close approach of 2021 CC. Catalogue miss distance 27.8 LD · 1.07 × 10⁷ km. The curve is the geocentric path from 2028-02-01 to 2028-02-07, 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
2028-02-04 00:25:00 Earth 0.0715 AU 27.8 LD 6 km/s
2028-08-04 05:27:00 Earth 0.2498 AU 97.2 LD 8.6 km/s
2029-04-30 18:13:00 Earth 0.4552 AU 177.1 LD 19.2 km/s
2035-02-22 22:13:00 Earth 0.1293 AU 50.3 LD 5.8 km/s
2035-07-20 06:36:00 Earth 0.2248 AU 87.5 LD 7.7 km/s
2040-10-27 20:43:00 Venus 0.0533 AU 20.8 LD 8.6 km/s
2041-11-15 04:13:00 Earth 0.2595 AU 101.0 LD 6.1 km/s
2042-03-21 04:16:00 Earth 0.1636 AU 63.7 LD 5.6 km/s
2042-06-29 08:31:00 Earth 0.1904 AU 74.1 LD 6.4 km/s
2048-02-05 14:21:00 Earth 0.4083 AU 158.9 LD 19 km/s

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

Sources