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Asteroid Near-Earth

2013 TK4

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(2013 TK4)

Where is it now

Distance from Sun
0.959 AU
True anomaly
250.15°
Distance from Earth
1.365 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 2013 TK4 — 0.959 AU from the Sun 2013 TK4
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2013 TK4 is 1.365 AU from Earth today (11.4 light-minutes).

In the sky

Right ascension
10h 57m 05s
Declination
+01° 22′ 57″
Constellation
Leo
Distance from Earth
1.36 AU
Elongation from the Sun
44.62° — 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
0.936 AU
Eccentricity
0.2478
Inclination
7.02°
Orbital period
330.7 days
Perihelion
0.704 AU
Aphelion
1.168 AU
Longitude of ascending node
204.01°
Argument of periapsis
23.74°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 25.9 LD
0.0666 AU
Tisserand (Jupiter)
6.375

Orbit quality

Orbit very well determined (uncertainty code 1).

Observations used
27
Data arc
10.11 years
First observed
2 October 2013
Last observed
12 November 2023
Residual RMS
0.56 ″
Solution · Otto Matic
13 November 2023

Visual & observation

Absolute magnitude (H)
23.98

Discovery & classification

Aten Near-Earth Object

Close approaches 164 on record

Flyby geometry
Ecliptic flyby of 2013 TK4 at 2031-09-29 17:49 UTC Top-down view of the ecliptic, Earth at the centre, for the 2031-09-29 17:49 UTC close approach of 2013 TK4. Catalogue miss distance 189.2 LD · 7.27 × 10⁷ km. The curve is the geocentric path from 2031-09-26 to 2031-10-02, 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 189.2 LD · 7.27 × 10⁷ km 2031-09-29 17:49 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2031-09-29 17:49 UTC close approach of 2013 TK4. Catalogue miss distance 189.2 LD · 7.27 × 10⁷ km. The curve is the geocentric path from 2031-09-26 to 2031-10-02, 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
2031-09-29 17:49:00 Earth 0.4861 AU 189.2 LD 22.4 km/s
2032-09-24 20:31:00 Earth 0.0967 AU 37.6 LD 6.5 km/s
2033-05-06 15:22:00 Earth 0.3076 AU 119.7 LD 10.9 km/s
2034-01-14 07:25:00 Earth 0.1205 AU 46.9 LD 7.2 km/s
2035-03-14 20:27:00 Venus 0.1078 AU 42.0 LD 9.7 km/s
2036-12-06 02:37:00 Venus 0.0934 AU 36.4 LD 10.4 km/s
2041-09-20 04:52:00 Earth 0.2497 AU 97.2 LD 14.9 km/s
2042-06-26 22:10:00 Earth 0.2857 AU 111.2 LD 8.3 km/s
2042-11-09 06:01:00 Earth 0.1858 AU 72.3 LD 6.9 km/s
2043-03-30 02:44:00 Earth 0.2664 AU 103.7 LD 9.3 km/s

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

Sources