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Asteroid Near-Earth

164201

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164201 (2004 EC)

Where is it now

Distance from Sun
1.069 AU
True anomaly
126.67°
Distance from Earth
1.972 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth 164201 — 1.069 AU from the Sun 164201
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 164201 is 1.972 AU from Earth today (16.4 light-minutes).

In the sky

Right ascension
12h 38m 48s
Declination
+08° 58′ 15″
Constellation
Virgo
Distance from Earth
1.98 AU
Elongation from the Sun
18.14° — too close to the Sun to observe

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
1.997 AU
Eccentricity
0.86
Inclination
34.58°
Orbital period
2.82 years
Perihelion
0.279 AU
Aphelion
3.714 AU
Longitude of ascending node
28.82°
Argument of periapsis
10.34°
Epoch · J2000
2461200.5
Orbit class · APO
Apollo
Earth MOID · 160.5 LD
0.4124 AU
Tisserand (Jupiter)
3.126

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
1,193
Data arc
22.37 years
First observed
10 March 2004
Last observed
25 July 2026
Residual RMS
0.42 ″
Solution · Otto Matic
26 July 2026

Physical properties

Rotation period
3.91 hours

Visual & observation

Absolute magnitude (H)
15.73

Discovery & classification

Discovered by
LINEAR
Discovery date
10 March 2004
Discovery site
Socorro

Also known as 2004 EC

Apollo Near-Earth Object

Close approaches 25 on record

When (UTC) Body Distance Lunar distances Relative speed
2041-12-14 10:04:00 Juptr 1.9872 AU 773.4 LD 9.6 km/s
2053-06-14 20:04:00 Juptr 1.8052 AU 702.5 LD 8.3 km/s
2091-08-14 01:03:00 Mercury 0.0608 AU 23.7 LD 37.5 km/s
2091-08-14 01:03:00 Merc 0.0608 AU 23.7 LD 37.5 km/s
2101-04-12 01:07:00 Juptr 1.9944 AU 776.2 LD 9.6 km/s
2112-10-11 21:31:00 Juptr 1.8046 AU 702.3 LD 8.3 km/s
2134-01-07 09:13:00 Mercury 0.0541 AU 21.1 LD 37.1 km/s
2134-01-07 09:13:00 Merc 0.0541 AU 21.1 LD 37.1 km/s
2153-10-12 05:41:00 Mercury 0.097 AU 37.7 LD 39.4 km/s
2153-10-12 05:41:00 Merc 0.097 AU 37.7 LD 39.4 km/s

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

Sources