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Asteroid Near-Earth

2018 CB2

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(2018 CB2)

Where is it now

Distance from Sun
0.574 AU
True anomaly
9.59°
Distance from Earth
1.269 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 2018 CB2 — 0.574 AU from the Sun 2018 CB2
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2018 CB2 is 1.269 AU from Earth today (10.6 light-minutes).

In the sky

Right ascension
15h 30m 58s
Declination
-12° 24′ 37″
Constellation
Libra
Distance from Earth
1.26 AU
Elongation from the Sun
26.26° — 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
0.895 AU
Eccentricity
0.3611
Inclination
22.84°
Orbital period
309.2 days
Perihelion
0.572 AU
Aphelion
1.218 AU
Longitude of ascending node
140.86°
Argument of periapsis
129.45°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 6.5 LD
0.0167 AU
Tisserand (Jupiter)
6.527

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
48
Data arc
4 days
First observed
8 February 2018
Last observed
12 February 2018
Residual RMS
0.33 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
25

Discovery & classification

Aten Near-Earth Object

Close approaches 91 on record

Flyby geometry
Ecliptic flyby of 2018 CB2 at 2027-10-10 22:07 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-10-10 22:07 UTC close approach of 2018 CB2. Catalogue miss distance 134.9 LD · 5.18 × 10⁷ km. The curve is the geocentric path from 2027-10-07 to 2027-10-13, 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 south of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 134.9 LD · 5.18 × 10⁷ km 2027-10-10 22:07 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-10-10 22:07 UTC close approach of 2018 CB2. Catalogue miss distance 134.9 LD · 5.18 × 10⁷ km. The curve is the geocentric path from 2027-10-07 to 2027-10-13, 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 south 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
2027-10-10 22:07:00 Earth 0.3466 AU 134.9 LD 18.1 km/s
2028-07-02 22:50:00 Earth 0.4829 AU 187.9 LD 19.9 km/s
2028-07-23 20:45:00 Venus 0.0607 AU 23.6 LD 17.7 km/s
2029-02-11 14:00:00 Earth 0.0367 AU 14.3 LD 14.8 km/s
2032-08-02 23:21:00 Venus 0.1491 AU 58.0 LD 16.9 km/s
2033-08-24 17:46:00 Earth 0.3511 AU 136.6 LD 17.8 km/s
2034-01-07 08:44:00 Earth 0.4045 AU 157.4 LD 12.1 km/s
2035-01-31 11:40:00 Earth 0.3829 AU 149.0 LD 25.6 km/s
2035-05-04 17:22:00 Venus 0.0741 AU 28.8 LD 19.4 km/s
2038-10-16 17:30:00 Earth 0.3744 AU 145.7 LD 19.2 km/s

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

Sources