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Asteroid Near-Earth

2020 XK3

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(2020 XK3)

Where is it now

Distance from Sun
0.815 AU
True anomaly
78.91°
Distance from Earth
1.219 AU
As of
21 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 2020 XK3 — 0.815 AU from the Sun 2020 XK3
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2020 XK3 is 1.219 AU from Earth today (10.1 light-minutes).

In the sky

Right ascension
16h 09m 46s
Declination
+11° 32′ 03″
Constellation
Serpens
Distance from Earth
1.22 AU
Elongation from the Sun
41.9° — 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
0.924 AU
Eccentricity
0.2701
Inclination
57.29°
Orbital period
324.6 days
Perihelion
0.675 AU
Aphelion
1.174 AU
Longitude of ascending node
254.02°
Argument of periapsis
349.55°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 70.3 LD
0.1805 AU
Tisserand (Jupiter)
6.068

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
75
Data arc
34 days
First observed
9 December 2020
Last observed
12 January 2021
Residual RMS
0.37 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
21.73

Discovery & classification

Aten Near-Earth Object

Close approaches 63 on record

Flyby geometry
Ecliptic flyby of 2020 XK3 at 2028-06-22 13:58 UTC Top-down view of the ecliptic, Earth at the centre, for the 2028-06-22 13:58 UTC close approach of 2020 XK3. Catalogue miss distance 159.5 LD · 6.13 × 10⁷ km. The curve is the geocentric path from 2028-06-19 to 2028-06-25, 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 159.5 LD · 6.13 × 10⁷ km 2028-06-22 13:58 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2028-06-22 13:58 UTC close approach of 2020 XK3. Catalogue miss distance 159.5 LD · 6.13 × 10⁷ km. The curve is the geocentric path from 2028-06-19 to 2028-06-25, 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
2028-06-22 13:58:00 Earth 0.4099 AU 159.5 LD 35.9 km/s
2028-12-06 22:59:00 Earth 0.1957 AU 76.2 LD 26.4 km/s
2029-05-11 04:28:00 Earth 0.4676 AU 182.0 LD 36 km/s
2029-12-02 03:17:00 Earth 0.4598 AU 178.9 LD 30.2 km/s
2030-04-03 17:46:00 Venus 0.1328 AU 51.7 LD 38.7 km/s
2036-06-21 23:56:00 Earth 0.4053 AU 157.7 LD 35.8 km/s
2036-12-06 23:02:00 Earth 0.1929 AU 75.1 LD 26.4 km/s
2037-05-10 14:11:00 Earth 0.4732 AU 184.1 LD 36 km/s
2037-12-02 00:54:00 Earth 0.467 AU 181.8 LD 30.3 km/s
2038-04-03 01:44:00 Venus 0.1273 AU 49.5 LD 38.7 km/s

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

Sources