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Asteroid Near-Earth

2008 CT1

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(2008 CT1)

Where is it now

Distance from Sun
0.507 AU
True anomaly
31.01°
Distance from Earth
1.133 AU
As of
20 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 2008 CT1 — 0.507 AU from the Sun 2008 CT1
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2008 CT1 is 1.133 AU from Earth today (9.4 light-minutes).

In the sky

Right ascension
15h 29m 39s
Declination
-18° 53′ 51″
Constellation
Libra
Distance from Earth
1.13 AU
Elongation from the Sun
26.91° — 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
0.891 AU
Eccentricity
0.4565
Inclination
0.37°
Orbital period
307.1 days
Perihelion
0.484 AU
Aphelion
1.297 AU
Longitude of ascending node
138.09°
Argument of periapsis
126.22°
Epoch · J2000
2454500.5
Orbit class · ATE
Aten
Earth MOID · 0.1 LD
0.0003 AU
Tisserand (Jupiter)
6.578

Orbit quality

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

Observations used
13
First observed
3 February 2008
Last observed
3 February 2008
Residual RMS
0.54 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
27.7

Discovery & classification

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

Aten Near-Earth Object

Close approaches 32 on record

Flyby geometry
Ecliptic flyby of 2008 CT1 at 2032-10-28 13:22 UTC Top-down view of the ecliptic, Earth at the centre, for the 2032-10-28 13:22 UTC close approach of 2008 CT1. Catalogue miss distance 89.0 LD · 3.42 × 10⁷ km. The curve is the geocentric path from 2032-10-25 to 2032-10-31, 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 89.0 LD · 3.42 × 10⁷ km 2032-10-28 13:22 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2032-10-28 13:22 UTC close approach of 2008 CT1. Catalogue miss distance 89.0 LD · 3.42 × 10⁷ km. The curve is the geocentric path from 2032-10-25 to 2032-10-31, 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
2032-10-28 13:22:00 Earth 0.2286 AU 89.0 LD 20.9 km/s
2035-02-04 06:36:00 Earth 0.0429 AU 16.7 LD 15.1 km/s
2039-10-22 12:05:00 Earth 0.014 AU 5.5 LD 14.1 km/s
2040-07-10 07:00:00 Earth 0.4956 AU 192.9 LD 19.6 km/s
2040-12-24 08:32:00 Earth 0.3296 AU 128.3 LD 10.9 km/s
2041-04-23 14:20:00 Earth 0.4422 AU 172.1 LD 15.6 km/s
2042-01-28 12:17:00 Earth 0.2452 AU 95.4 LD 21.5 km/s
2043-02-04 18:04:00 Mercury 0.0809 AU 31.5 LD 18.1 km/s
2043-02-04 18:04:00 Merc 0.0809 AU 31.5 LD 18.1 km/s
2045-10-27 19:06:00 Venus 0.0626 AU 24.3 LD 18.3 km/s

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

Sources