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Asteroid Near-Earth Potentially hazardous

745311

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745311 (2010 XC15)

Where is it now

Distance from Sun
0.921 AU
True anomaly
214.83°
Distance from Earth
1.295 AU
As of
15 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 745311 — 0.921 AU from the Sun 745311
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 745311 is 1.295 AU from Earth today (10.8 light-minutes).

In the sky

Right ascension
10h 42m 14s
Declination
+09° 42′ 47″
Constellation
Leo
Distance from Earth
1.29 AU
Elongation from the Sun
44.96° — 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
0.732 AU
Eccentricity
0.4199
Inclination
8.24°
Orbital period
229 days
Perihelion
0.425 AU
Aphelion
1.04 AU
Longitude of ascending node
94.4°
Argument of periapsis
158.12°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 0.9 LD
0.0023 AU
Tisserand (Jupiter)
7.778

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
279
Data arc
12.06 years
First observed
5 December 2010
Last observed
28 December 2022
Residual RMS
0.32 ″
Solution · Otto Matic
14 December 2024

Physical properties

Rotation period
2.67 hours

Visual & observation

Absolute magnitude (H)
21.48

Discovery & classification

Discovered by
CSS
Discovery date
5 December 2010
Discovery site
Catalina

Also known as 2010 XC15

Aten Near-Earth Object Potentially Hazardous Asteroid

Close approaches 215 on record

Flyby geometry
Ecliptic flyby of 745311 at 2027-12-18 20:37 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-12-18 20:37 UTC close approach of 745311. Catalogue miss distance 19.8 LD · 7.62 × 10⁶ km. The curve is the geocentric path from 2027-12-15 to 2027-12-21, 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 19.8 LD · 7.62 × 10⁶ km 2027-12-18 20:37 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-12-18 20:37 UTC close approach of 745311. Catalogue miss distance 19.8 LD · 7.62 × 10⁶ km. The curve is the geocentric path from 2027-12-15 to 2027-12-21, 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
2026-12-25 09:48:00 Merc 0.0603 AU 23.5 LD 15.6 km/s
2026-12-25 09:48:00 Mercury 0.0603 AU 23.5 LD 15.6 km/s
2027-12-18 20:37:00 Earth 0.0509 AU 19.8 LD 8.9 km/s
2030-02-16 13:42:00 Merc 0.0486 AU 18.9 LD 16 km/s
2030-02-16 13:42:00 Mercury 0.0486 AU 18.9 LD 16 km/s
2032-12-01 21:54:00 Earth 0.0823 AU 32.0 LD 8.8 km/s
2033-02-20 15:51:00 Venus 0.1042 AU 40.6 LD 20.2 km/s
2033-04-09 16:40:00 Merc 0.0318 AU 12.4 LD 18.4 km/s
2033-04-09 16:40:00 Mercury 0.0318 AU 12.4 LD 18.4 km/s
2033-10-05 21:27:00 Venus 0.0378 AU 14.7 LD 16 km/s

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

Sources