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Asteroid Near-Earth Potentially hazardous

523664

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523664 (2012 OD1)

Where is it now

Distance from Sun
0.872 AU
True anomaly
125.27°
Distance from Earth
1.328 AU
As of
19 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 523664 — 0.872 AU from the Sun 523664
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 523664 is 1.328 AU from Earth today (11.0 light-minutes).

In the sky

Right ascension
16h 18m 44s
Declination
-25° 59′ 44″
Constellation
Scorpius
Distance from Earth
1.33 AU
Elongation from the Sun
41.09° — near the Sun — look low at dusk or dawn

Favours the southern hemisphere; low or below the horizon from far north.

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
0.829 AU
Eccentricity
0.5029
Inclination
42.26°
Orbital period
275.6 days
Perihelion
0.412 AU
Aphelion
1.246 AU
Longitude of ascending node
303.72°
Argument of periapsis
224.36°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 15.0 LD
0.0384 AU
Tisserand (Jupiter)
6.789

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
1,140
Data arc
12.16 years
First observed
19 July 2012
Last observed
15 September 2024
Residual RMS
0.31 ″
Solution · Otto Matic
25 October 2025

Physical properties

Mean radius
0.17 km
Rotation period
12.63 hours

Visual & observation

Geometric albedo
0.536
Absolute magnitude (H)
18.52

Discovery & classification

Discovered by
OAM
Discovery date
19 July 2012
Discovery site
La Sagra

Also known as 2012 OD1

Aten Near-Earth Object Potentially Hazardous Asteroid

Close approaches 34 on record

Flyby geometry
Ecliptic flyby of 523664 at 2027-07-31 23:31 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-07-31 23:31 UTC close approach of 523664. Catalogue miss distance 39.9 LD · 1.54 × 10⁷ km. The curve is the geocentric path from 2027-07-28 to 2027-08-03, 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. Sun 39.9 LD · 1.54 × 10⁷ km 2027-07-31 23:31 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-07-31 23:31 UTC close approach of 523664. Catalogue miss distance 39.9 LD · 1.54 × 10⁷ km. The curve is the geocentric path from 2027-07-28 to 2027-08-03, 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
2027-07-31 23:31:00 Earth 0.1026 AU 39.9 LD 25.7 km/s
2030-08-04 09:37:00 Earth 0.1981 AU 77.1 LD 28 km/s
2061-07-25 12:57:00 Earth 0.1298 AU 50.5 LD 21.7 km/s
2064-07-27 12:38:00 Earth 0.0478 AU 18.6 LD 23.2 km/s
2067-07-31 03:54:00 Earth 0.0767 AU 29.8 LD 25 km/s
2070-08-03 09:42:00 Earth 0.1684 AU 65.6 LD 27.2 km/s
2101-07-26 01:44:00 Earth 0.1678 AU 65.3 LD 21.2 km/s
2104-07-27 15:45:00 Earth 0.0786 AU 30.6 LD 22.5 km/s
2107-07-31 00:32:00 Earth 0.0467 AU 18.2 LD 24.2 km/s
2110-08-03 02:13:00 Earth 0.1296 AU 50.5 LD 26.3 km/s

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

Sources