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Asteroid Near-Earth

2025 CJ4

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(2025 CJ4)

Where is it now

Distance from Sun
0.938 AU
True anomaly
157.55°
Distance from Earth
1.544 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 2025 CJ4 — 0.938 AU from the Sun 2025 CJ4
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 CJ4 is 1.544 AU from Earth today (12.8 light-minutes).

In the sky

Right ascension
11h 07m 47s
Declination
+01° 30′ 47″
Constellation
Leo
Distance from Earth
1.54 AU
Elongation from the Sun
35.9° — 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
0.692 AU
Eccentricity
0.4333
Inclination
20.93°
Orbital period
210.4 days
Perihelion
0.392 AU
Aphelion
0.992 AU
Longitude of ascending node
145.37°
Argument of periapsis
184.28°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 1.1 LD
0.0027 AU
Tisserand (Jupiter)
8.13

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
57
Data arc
24 hours
First observed
14 February 2025
Last observed
15 February 2025
Residual RMS
0.33 ″
Solution · Otto Matic
16 February 2025

Visual & observation

Absolute magnitude (H)
26.16

Discovery & classification

Aten Near-Earth Object

Close approaches 37 on record

Flyby geometry
Ecliptic flyby of 2025 CJ4 at 2029-02-07 11:47 UTC Top-down view of the ecliptic, Earth at the centre, for the 2029-02-07 11:47 UTC close approach of 2025 CJ4. Catalogue miss distance 55.6 LD · 2.14 × 10⁷ km. The curve is the geocentric path from 2029-02-04 to 2029-02-10, 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 55.6 LD · 2.14 × 10⁷ km 2029-02-07 11:47 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2029-02-07 11:47 UTC close approach of 2025 CJ4. Catalogue miss distance 55.6 LD · 2.14 × 10⁷ km. The curve is the geocentric path from 2029-02-04 to 2029-02-10, 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
2029-02-07 11:47:00 Earth 0.1429 AU 55.6 LD 14.5 km/s
2029-06-18 17:25:00 Merc 0.0672 AU 26.2 LD 31 km/s
2029-06-18 17:25:00 Mercury 0.0672 AU 26.2 LD 31 km/s
2032-05-06 04:27:00 Merc 0.0332 AU 12.9 LD 24.4 km/s
2032-05-06 04:27:00 Mercury 0.0332 AU 12.9 LD 24.4 km/s
2040-02-21 11:45:00 Earth 0.0874 AU 34.0 LD 12.7 km/s
2044-02-11 18:02:00 Earth 0.0473 AU 18.4 LD 12.6 km/s
2045-08-06 06:47:00 Merc 0.0231 AU 9.0 LD 27.2 km/s
2045-08-06 06:47:00 Mercury 0.0231 AU 9.0 LD 27.2 km/s
2048-06-22 23:50:00 Mercury 0.0696 AU 27.1 LD 23.1 km/s

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

Sources