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Asteroid Near-Earth Potentially hazardous

413260

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413260 (2003 TL4)

Where is it now

Distance from Sun
0.854 AU
True anomaly
125.69°
Distance from Earth
1.146 AU
As of
16 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 413260 — 0.854 AU from the Sun 413260
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 413260 is 1.146 AU from Earth today (9.5 light-minutes).

In the sky

Right ascension
16h 36m 51s
Declination
-12° 54′ 25″
Constellation
Ophiuchus
Distance from Earth
1.15 AU
Elongation from the Sun
46.44° — 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
0.777 AU
Eccentricity
0.3814
Inclination
12.19°
Orbital period
250 days
Perihelion
0.48 AU
Aphelion
1.073 AU
Longitude of ascending node
219.99°
Argument of periapsis
321.97°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 9.9 LD
0.0255 AU
Tisserand (Jupiter)
7.397

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
463
Data arc
21.98 years
First observed
13 October 2003
Last observed
5 October 2025
Residual RMS
0.35 ″
Solution · Otto Matic
16 June 2026

Physical properties

Rotation period
27.2 hours

Visual & observation

Absolute magnitude (H)
19.57

Discovery & classification

Discovered by
LINEAR
Discovery date
13 October 2003
Discovery site
Socorro

Also known as 2003 TL4

Aten Near-Earth Object Potentially Hazardous Asteroid

Close approaches 136 on record

Flyby geometry
Ecliptic flyby of 413260 at 2029-10-26 15:29 UTC Top-down view of the ecliptic, Earth at the centre, for the 2029-10-26 15:29 UTC close approach of 413260. Catalogue miss distance 16.6 LD · 6.36 × 10⁶ km. The curve is the geocentric path from 2029-10-23 to 2029-10-29, 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 16.6 LD · 6.36 × 10⁶ km 2029-10-26 15:29 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2029-10-26 15:29 UTC close approach of 413260. Catalogue miss distance 16.6 LD · 6.36 × 10⁶ km. The curve is the geocentric path from 2029-10-23 to 2029-10-29, 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
2029-10-26 15:29:00 Earth 0.0425 AU 16.6 LD 9.7 km/s
2031-09-06 00:23:00 Earth 0.194 AU 75.5 LD 9.6 km/s
2037-09-01 18:09:00 Venus 0.1407 AU 54.8 LD 15.4 km/s
2038-12-26 15:48:00 Mercury 0.0676 AU 26.3 LD 16.3 km/s
2038-12-26 15:48:00 Merc 0.0676 AU 26.3 LD 16.3 km/s
2042-04-05 14:39:00 Venus 0.1003 AU 39.0 LD 17.3 km/s
2042-10-20 15:01:00 Earth 0.0937 AU 36.5 LD 8.8 km/s
2048-05-31 01:36:00 Venus 0.0989 AU 38.5 LD 14.1 km/s
2051-12-31 01:54:00 Merc 0.0966 AU 37.6 LD 18.8 km/s
2053-10-27 19:05:00 Earth 0.1306 AU 50.8 LD 14 km/s

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

Sources