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Asteroid Near-Earth

2020 DO4

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(2020 DO4)

Where is it now

Distance from Sun
0.736 AU
True anomaly
332.98°
Distance from Earth
0.524 AU
As of
21 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 2020 DO4 — 0.736 AU from the Sun 2020 DO4
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2020 DO4 is 0.524 AU from Earth today (4.4 light-minutes).

In the sky

Right ascension
16h 52m 58s
Declination
-22° 45′ 23″
Constellation
Ophiuchus
Distance from Earth
0.52 AU
Elongation from the Sun
45.95° — 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
0.911 AU
Eccentricity
0.2079
Inclination
1.17°
Orbital period
317.8 days
Perihelion
0.722 AU
Aphelion
1.101 AU
Longitude of ascending node
170.64°
Argument of periapsis
213.87°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 2.9 LD
0.0074 AU
Tisserand (Jupiter)
6.528

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
33
Data arc
6 days
First observed
27 February 2020
Last observed
4 March 2020
Residual RMS
0.51 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
27.5

Discovery & classification

Aten Near-Earth Object

Close approaches 49 on record

Flyby geometry
Ecliptic flyby of 2020 DO4 at 2026-12-13 21:42 UTC Top-down view of the ecliptic, Earth at the centre, for the 2026-12-13 21:42 UTC close approach of 2020 DO4. Catalogue miss distance 82.2 LD · 3.16 × 10⁷ km. The curve is the geocentric path from 2026-12-10 to 2026-12-16, 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 82.2 LD · 3.16 × 10⁷ km 2026-12-13 21:42 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2026-12-13 21:42 UTC close approach of 2020 DO4. Catalogue miss distance 82.2 LD · 3.16 × 10⁷ km. The curve is the geocentric path from 2026-12-10 to 2026-12-16, 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
2026-12-13 21:42:00 Earth 0.2111 AU 82.2 LD 5.6 km/s
2027-04-26 02:48:00 Earth 0.0944 AU 36.7 LD 4.4 km/s
2032-11-17 20:05:00 Venus 0.0952 AU 37.0 LD 8.1 km/s
2033-02-26 02:15:00 Earth 0.3352 AU 130.5 LD 15.9 km/s
2033-10-30 13:24:00 Earth 0.2688 AU 104.6 LD 8.4 km/s
2034-06-03 06:53:00 Earth 0.093 AU 36.2 LD 8.2 km/s
2040-02-17 20:15:00 Earth 0.0541 AU 21.0 LD 7.2 km/s
2040-09-15 15:36:00 Earth 0.2641 AU 102.8 LD 8 km/s
2041-05-25 13:32:00 Earth 0.3562 AU 138.6 LD 16.4 km/s
2047-01-05 06:37:00 Earth 0.1726 AU 67.2 LD 3.4 km/s

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

Sources