Asteroid Near-Earth

858130

858130 (2012 US136)

Where is it now

Distance from Sun: 8.046 AU
True anomaly: 183.39°
Distance from Earth: 8.128 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.

Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 858130 is 8.128 AU from Earth today (1.1 light-hours).

In the sky

Right ascension: 09h 53m 44s
Declination: +66° 44′ 38″
Constellation: Ursa Major
Distance from Earth: 8.12 AU
Elongation from the Sun: 82.13° — 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.

Paste a location

How do I find my coordinates?

Google Maps on a computer

Right-click the spot where you'll be observing.
The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
Paste them above.

Google Maps on a phone

Press and hold the spot to drop a pin.
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: 4.284 AU
Eccentricity: 0.9121
Inclination: 51.89°
Orbital period: 8.87 years
Perihelion: 0.376 AU
Aphelion: 8.192 AU
Longitude of ascending node: 0.42°
Argument of periapsis: 279.19°
Epoch · J2000: 2461200.5
Orbit class · APO: Apollo
Earth MOID · 36.3 LD: 0.0933 AU
Tisserand (Jupiter): 1.674

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used: 698
Data arc: 19.09 years
First observed: 13 December 2002
Last observed: 13 January 2022
Residual RMS: 0.33 ″
Solution · Otto Matic: 30 October 2025

Visual & observation

Absolute magnitude (H): 15.73

Discovery & classification

Discovered by: Mount Lemmon Survey
Discovery date: 21 October 2012
Discovery site: Mount Lemmon

Also known as 2012 US136

Apollo Near-Earth Object

Close approaches 5 on record

Flyby geometry

Top-down view of the ecliptic, Earth at the centre, for the 2048-03-08 13:17 UTC close approach of 858130. Catalogue miss distance 76.9 LD · 2.96 × 10⁷ km. The curve is the geocentric path from 2048-03-05 to 2048-03-11, 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 inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC)	Body	Distance	Lunar distances	Relative speed
2048-03-08 13:17:00	Earth	0.1976 AU	76.9 LD	44.7 km/s
2101-07-05 09:32:00	Venus	0.1139 AU	44.3 LD	43.9 km/s
2199-03-21 22:48:00	Earth	0.1096 AU	42.7 LD	37.9 km/s

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

Sources

visual properties: JPL SBDB (lookup)
orbital elements: JPL SBDB