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Asteroid Near-Earth Potentially hazardous

111253

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111253 (2001 XU10)

Where is it now

Distance from Sun
1.015 AU
True anomaly
26.71°
Distance from Earth
0.792 AU
As of
11 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth 111253 — 1.015 AU from the Sun 111253
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 111253 is 0.792 AU from Earth today (6.6 light-minutes).

In the sky

Right ascension
17h 37m 39s
Declination
+05° 32′ 18″
Constellation
Ophiuchus
Distance from Earth
0.8 AU
Elongation from the Sun
68.01° — 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
1.753 AU
Eccentricity
0.4399
Inclination
42.04°
Orbital period
848 days
Perihelion
0.982 AU
Aphelion
2.525 AU
Longitude of ascending node
310.14°
Argument of periapsis
6.97°
Epoch · J2000
2461200.5
Orbit class · APO
Apollo
Earth MOID · 12.0 LD
0.0307 AU
Tisserand (Jupiter)
3.742

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
2,564
Data arc
26.67 years
First observed
8 February 2000
Last observed
9 October 2026
Residual RMS
0.49 ″
Solution · Otto Matic
10 October 2026

Physical properties

Mean radius
1.50 km

Visual & observation

Geometric albedo
0.178
Absolute magnitude (H)
15.23

Discovery & classification

Discovered by
LINEAR
Discovery date
9 December 2001
Discovery site
Socorro

Also known as 2001 XU10

Apollo Near-Earth Object Potentially Hazardous Asteroid

Close approaches 10 on record

Flyby geometry
Ecliptic flyby of 111253 at 2047-08-08 10:14 UTC Top-down view of the ecliptic, Earth at the centre, for the 2047-08-08 10:14 UTC close approach of 111253. Catalogue miss distance 40.0 LD · 1.54 × 10⁷ km. The curve is the geocentric path from 2047-08-05 to 2047-08-11, 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 Moon’s position is approximate. The inset is a heliocentric view and is approximate. Sun 40.0 LD · 1.54 × 10⁷ km 2047-08-08 10:14 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2047-08-08 10:14 UTC close approach of 111253. Catalogue miss distance 40.0 LD · 1.54 × 10⁷ km. The curve is the geocentric path from 2047-08-05 to 2047-08-11, 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 Moon’s position is approximate. The inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2047-08-08 10:14:00 Earth 0.1028 AU 40.0 LD 24.3 km/s
2054-07-29 17:18:00 Earth 0.0798 AU 31.0 LD 24.4 km/s
2119-08-11 22:42:00 Earth 0.1439 AU 56.0 LD 24.4 km/s
2126-08-01 12:31:00 Earth 0.0543 AU 21.1 LD 24.4 km/s
2184-08-14 03:55:00 Earth 0.1933 AU 75.2 LD 24.5 km/s
2191-08-03 20:23:00 Earth 0.0331 AU 12.9 LD 24.3 km/s

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

Sources