Skip to content
Public Universe
Asteroid Near-Earth

2018 CX1

Add to an observing list or journal →

(2018 CX1)

Where is it now

Distance from Sun
1.08 AU
True anomaly
155.8°
Distance from Earth
1.227 AU
As of
17 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 2018 CX1 — 1.08 AU from the Sun 2018 CX1
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2018 CX1 is 1.227 AU from Earth today (10.2 light-minutes).

In the sky

Right ascension
11h 14m 46s
Declination
+37° 11′ 27″
Constellation
Ursa Major
Distance from Earth
1.23 AU
Elongation from the Sun
57.15° — near the Sun — look low at dusk or dawn

Favours the northern hemisphere; low or below the horizon from far south.

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
0.818 AU
Eccentricity
0.3955
Inclination
33.97°
Orbital period
270.3 days
Perihelion
0.495 AU
Aphelion
1.142 AU
Longitude of ascending node
0.88°
Argument of periapsis
295.91°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 50.9 LD
0.1307 AU
Tisserand (Jupiter)
6.964

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
62
Data arc
8.16 years
First observed
6 February 2018
Last observed
5 April 2026
Residual RMS
0.42 ″
Solution · Otto Matic
5 April 2026

Visual & observation

Absolute magnitude (H)
20.19

Discovery & classification

Aten Near-Earth Object

Close approaches 54 on record

Flyby geometry
Ecliptic flyby of 2018 CX1 at 2038-03-14 22:16 UTC Top-down view of the ecliptic, Earth at the centre, for the 2038-03-14 22:16 UTC close approach of 2018 CX1. Catalogue miss distance 50.9 LD · 1.96 × 10⁷ km. The curve is the geocentric path from 2038-03-11 to 2038-03-17, 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. At closest approach the object is north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 50.9 LD · 1.96 × 10⁷ km 2038-03-14 22:16 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2038-03-14 22:16 UTC close approach of 2018 CX1. Catalogue miss distance 50.9 LD · 1.96 × 10⁷ km. The curve is the geocentric path from 2038-03-11 to 2038-03-17, 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. At closest approach the object is north of the ecliptic. 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
2038-03-14 22:16:00 Earth 0.1309 AU 50.9 LD 20.8 km/s
2045-10-29 22:33:00 Venus 0.1491 AU 58.0 LD 25.1 km/s
2048-08-07 21:52:00 Venus 0.1462 AU 56.9 LD 26 km/s
2049-07-13 03:06:00 Venus 0.1398 AU 54.4 LD 26 km/s
2052-04-17 23:17:00 Venus 0.1202 AU 46.8 LD 24.3 km/s
2055-03-20 11:07:00 Earth 0.1738 AU 67.6 LD 18.9 km/s
2055-12-27 16:41:00 Venus 0.1174 AU 45.7 LD 22.8 km/s
2058-03-09 04:05:00 Earth 0.1781 AU 69.3 LD 23.3 km/s
2059-09-05 23:59:00 Venus 0.139 AU 54.1 LD 21.5 km/s
2075-03-15 07:49:00 Earth 0.1307 AU 50.9 LD 20.8 km/s

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

Sources