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Asteroid Near-Earth

878293

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878293 (2011 YX10)

Where is it now

Distance from Sun
1.267 AU
True anomaly
174.84°
Distance from Earth
0.928 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 878293 — 1.267 AU from the Sun 878293
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 878293 is 0.928 AU from Earth today (7.7 light-minutes).

In the sky

Right ascension
08h 52m 03s
Declination
+29° 02′ 04″
Constellation
Cancer
Distance from Earth
0.92 AU
Elongation from the Sun
82.6° — 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
0.954 AU
Eccentricity
0.3307
Inclination
25.23°
Orbital period
340.4 days
Perihelion
0.639 AU
Aphelion
1.27 AU
Longitude of ascending node
272.98°
Argument of periapsis
345.79°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 94.3 LD
0.2423 AU
Tisserand (Jupiter)
6.185

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
108
Data arc
14.08 years
First observed
25 December 2011
Last observed
21 January 2026
Residual RMS
0.56 ″
Solution · Otto Matic
14 March 2026

Visual & observation

Absolute magnitude (H)
21.57

Discovery & classification

Discovered by
Mount Lemmon Survey
Discovery date
25 December 2011
Discovery site
Mount Lemmon

Also known as 2011 YX10

Aten Near-Earth Object

Close approaches 20 on record

When (UTC) Body Distance Lunar distances Relative speed
2048-09-29 03:52:00 Venus 0.096 AU 37.4 LD 20.6 km/s
2050-08-13 20:14:00 Venus 0.1089 AU 42.4 LD 21.2 km/s
2079-06-29 09:31:00 Venus 0.1307 AU 50.9 LD 20.8 km/s
2081-05-13 06:35:00 Venus 0.0856 AU 33.3 LD 20.7 km/s
2112-02-11 17:37:00 Venus 0.0932 AU 36.3 LD 20.6 km/s
2113-12-26 10:24:00 Venus 0.1133 AU 44.1 LD 21.3 km/s
2142-11-11 09:40:00 Venus 0.1226 AU 47.7 LD 20.7 km/s
2144-09-25 08:09:00 Venus 0.0884 AU 34.4 LD 20.8 km/s
2175-06-26 00:48:00 Venus 0.088 AU 34.2 LD 20.6 km/s
2177-05-09 14:35:00 Venus 0.1231 AU 47.9 LD 21.5 km/s

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

Sources