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Asteroid Near-Earth

2012 XM145

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(2012 XM145)

Where is it now

Distance from Sun
1.036 AU
True anomaly
161.53°
Distance from Earth
0.322 AU
As of
20 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 — 0.996 AU from the Sun Earth 2012 XM145 — 1.036 AU from the Sun 2012 XM145
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2012 XM145 is 0.322 AU from Earth today (2.7 light-minutes).

In the sky

Right ascension
09h 59m 21s
Declination
+68° 32′ 11″
Constellation
Ursa Major
Distance from Earth
0.32 AU
Elongation from the Sun
88.19° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
0.877 AU
Eccentricity
0.1965
Inclination
26.21°
Orbital period
299.9 days
Perihelion
0.705 AU
Aphelion
1.049 AU
Longitude of ascending node
249.42°
Argument of periapsis
345.14°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 20.9 LD
0.0537 AU
Tisserand (Jupiter)
6.656

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
82
Data arc
13.94 years
First observed
16 December 2003
Last observed
25 November 2017
Residual RMS
0.55 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
20.4

Discovery & classification

Aten Near-Earth Object

Close approaches 143 on record

Flyby geometry
Ecliptic flyby of 2012 XM145 at 2026-12-03 13:19 UTC Top-down view of the ecliptic, Earth at the centre, for the 2026-12-03 13:19 UTC close approach of 2012 XM145. Catalogue miss distance 25.1 LD · 9.63 × 10⁶ km. The curve is the geocentric path from 2026-11-30 to 2026-12-06, 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 south of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 25.1 LD · 9.63 × 10⁶ km 2026-12-03 13:19 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2026-12-03 13:19 UTC close approach of 2012 XM145. Catalogue miss distance 25.1 LD · 9.63 × 10⁶ km. The curve is the geocentric path from 2026-11-30 to 2026-12-06, 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 south 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
2026-12-03 13:19:00 Earth 0.0644 AU 25.1 LD 13.6 km/s
2031-05-24 01:15:00 Earth 0.3115 AU 121.2 LD 17.9 km/s
2031-12-04 01:51:00 Earth 0.4485 AU 174.5 LD 21 km/s
2035-08-04 16:59:00 Earth 0.4335 AU 168.7 LD 14.8 km/s
2035-11-29 20:21:00 Earth 0.1298 AU 50.5 LD 13.6 km/s
2036-03-29 15:18:00 Earth 0.4337 AU 168.8 LD 14.4 km/s
2040-06-10 22:03:00 Earth 0.3084 AU 120.0 LD 17.8 km/s
2040-12-05 04:04:00 Earth 0.2851 AU 110.9 LD 17.1 km/s
2044-11-24 04:17:00 Earth 0.2783 AU 108.3 LD 15.1 km/s
2045-04-24 03:08:00 Earth 0.376 AU 146.3 LD 17.1 km/s

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

Sources