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Asteroid Near-Earth

2023 XJ13

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(2023 XJ13)

Where is it now

Distance from Sun
0.932 AU
True anomaly
153.06°
Distance from Earth
0.486 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 2023 XJ13 — 0.932 AU from the Sun 2023 XJ13
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2023 XJ13 is 0.486 AU from Earth today (4.0 light-minutes).

In the sky

Right ascension
08h 59m 10s
Declination
+07° 50′ 35″
Constellation
Cancer
Distance from Earth
0.48 AU
Elongation from the Sun
68.54° — well clear of the Sun

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
0.703 AU
Eccentricity
0.4352
Inclination
9.86°
Orbital period
215.5 days
Perihelion
0.397 AU
Aphelion
1.009 AU
Longitude of ascending node
79.12°
Argument of periapsis
178.41°
Epoch · J2000
2460291.5
Orbit class · ATE
Aten
Earth MOID · 9.4 LD
0.0242 AU
Tisserand (Jupiter)
8.05

Orbit quality

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

Observations used
12
Data arc
24 hours
First observed
13 December 2023
Last observed
14 December 2023
Residual RMS
0.59 ″
Solution · Otto Matic
14 December 2023

Visual & observation

Absolute magnitude (H)
27.01

Discovery & classification

Aten Near-Earth Object

Close approaches 78 on record

Flyby geometry
Ecliptic flyby of 2023 XJ13 at 2026-12-28 05:04 UTC Top-down view of the ecliptic, Earth at the centre, for the 2026-12-28 05:04 UTC close approach of 2023 XJ13. Catalogue miss distance 84.8 LD · 3.26 × 10⁷ km. The curve is the geocentric path from 2026-12-25 to 2026-12-31, 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. 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 84.8 LD · 3.26 × 10⁷ km 2026-12-28 05:04 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2026-12-28 05:04 UTC close approach of 2023 XJ13. Catalogue miss distance 84.8 LD · 3.26 × 10⁷ km. The curve is the geocentric path from 2026-12-25 to 2026-12-31, 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. 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
2026-12-28 05:04:00 Earth 0.2178 AU 84.8 LD 16.2 km/s
2028-11-02 04:24:00 Venus 0.0784 AU 30.5 LD 17.5 km/s
2029-12-18 19:24:00 Earth 0.4935 AU 192.1 LD 26.1 km/s
2030-11-24 19:07:00 Earth 0.3079 AU 119.8 LD 19.4 km/s
2039-12-25 16:50:00 Earth 0.324 AU 126.1 LD 20 km/s
2075-12-24 19:48:00 Earth 0.3538 AU 137.7 LD 21 km/s
2079-11-22 12:04:00 Earth 0.1819 AU 70.8 LD 14.9 km/s
2082-03-01 12:27:00 Venus 0.1131 AU 44.0 LD 20 km/s
2082-10-10 04:49:00 Venus 0.1143 AU 44.5 LD 11.8 km/s
2085-12-28 18:18:00 Earth 0.1782 AU 69.3 LD 14.7 km/s

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

Sources