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Asteroid Near-Earth

2023 KJ4

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(2023 KJ4)

Where is it now

Distance from Sun
0.747 AU
True anomaly
331.07°
Distance from Earth
0.91 AU
As of
22 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 2023 KJ4 — 0.747 AU from the Sun 2023 KJ4
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 KJ4 is 0.91 AU from Earth today (7.6 light-minutes).

In the sky

Right ascension
10h 52m 42s
Declination
+00° 24′ 17″
Constellation
Leo
Distance from Earth
0.91 AU
Elongation from the Sun
45.79° — 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
0.952 AU
Eccentricity
0.2335
Inclination
14.52°
Orbital period
339.1 days
Perihelion
0.729 AU
Aphelion
1.174 AU
Longitude of ascending node
239.62°
Argument of periapsis
240.19°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 1.8 LD
0.0046 AU
Tisserand (Jupiter)
6.273

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
19
Data arc
17 days
First observed
27 May 2023
Last observed
13 June 2023
Residual RMS
0.44 ″
Solution · Otto Matic
8 June 2024

Visual & observation

Absolute magnitude (H)
27.01

Discovery & classification

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

Aten Near-Earth Object

Close approaches 37 on record

Flyby geometry
Ecliptic flyby of 2023 KJ4 at 2035-06-02 20:16 UTC Top-down view of the ecliptic, Earth at the centre, for the 2035-06-02 20:16 UTC close approach of 2023 KJ4. Catalogue miss distance 152.5 LD · 5.86 × 10⁷ km. The curve is the geocentric path from 2035-05-30 to 2035-06-05, 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 152.5 LD · 5.86 × 10⁷ km 2035-06-02 20:16 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2035-06-02 20:16 UTC close approach of 2023 KJ4. Catalogue miss distance 152.5 LD · 5.86 × 10⁷ km. The curve is the geocentric path from 2035-05-30 to 2035-06-05, 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
2035-06-02 20:16:00 Earth 0.3919 AU 152.5 LD 19.5 km/s
2036-05-19 17:09:00 Earth 0.0389 AU 15.1 LD 8.9 km/s
2037-01-22 06:59:00 Earth 0.3201 AU 124.6 LD 9.6 km/s
2037-11-07 16:53:00 Earth 0.158 AU 61.5 LD 9.9 km/s
2038-09-25 07:19:00 Earth 0.3871 AU 150.6 LD 18 km/s
2045-04-30 22:12:00 Venus 0.1221 AU 47.5 LD 14.8 km/s
2047-03-07 01:00:00 Venus 0.0849 AU 33.1 LD 13.4 km/s
2048-05-26 21:22:00 Earth 0.233 AU 90.7 LD 15.1 km/s
2049-01-09 21:04:00 Venus 0.0668 AU 26.0 LD 12.4 km/s
2049-06-03 00:20:00 Earth 0.2022 AU 78.7 LD 7.6 km/s

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

Sources