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Asteroid Near-Earth

2010 DJ77

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(2010 DJ77)

Where is it now

Distance from Sun
0.906 AU
True anomaly
88.12°
Distance from Earth
1.324 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 2010 DJ77 — 0.906 AU from the Sun 2010 DJ77
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2010 DJ77 is 1.324 AU from Earth today (11.0 light-minutes).

In the sky

Right ascension
11h 06m 02s
Declination
+01° 54′ 01″
Constellation
Leo
Distance from Earth
1.33 AU
Elongation from the Sun
43.19° — near the Sun — look low at dusk or dawn

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
0.955 AU
Eccentricity
0.2106
Inclination
24.75°
Orbital period
340.6 days
Perihelion
0.753 AU
Aphelion
1.156 AU
Longitude of ascending node
286.71°
Argument of periapsis
103.77°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 19.7 LD
0.0506 AU
Tisserand (Jupiter)
6.212

Orbit quality

Orbit very well determined (uncertainty code 1).

Observations used
56
Data arc
15.36 years
First observed
19 February 2010
Last observed
30 June 2025
Residual RMS
0.42 ″
Solution · Otto Matic
30 June 2025

Physical properties

Mean radius
0.14 km

Visual & observation

Absolute magnitude (H)
21.59

Discovery & classification

Also known as 2010 LE143

Aten Near-Earth Object

Close approaches 53 on record

Flyby geometry
Ecliptic flyby of 2010 DJ77 at 2037-01-20 04:03 UTC Top-down view of the ecliptic, Earth at the centre, for the 2037-01-20 04:03 UTC close approach of 2010 DJ77. Catalogue miss distance 57.6 LD · 2.22 × 10⁷ km. The curve is the geocentric path from 2037-01-17 to 2037-01-23, 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. At closest approach the object is south of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 57.6 LD · 2.22 × 10⁷ km 2037-01-20 04:03 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2037-01-20 04:03 UTC close approach of 2010 DJ77. Catalogue miss distance 57.6 LD · 2.22 × 10⁷ km. The curve is the geocentric path from 2037-01-17 to 2037-01-23, 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. At closest approach the object is south of the ecliptic. 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
2037-01-20 04:03:00 Earth 0.1481 AU 57.6 LD 16.3 km/s
2039-06-27 21:16:00 Earth 0.1879 AU 73.1 LD 17.1 km/s
2043-07-15 01:15:00 Venus 0.1324 AU 51.5 LD 18.1 km/s
2051-01-15 01:12:00 Earth 0.1075 AU 41.9 LD 15.1 km/s
2052-07-12 23:23:00 Earth 0.152 AU 59.2 LD 12.7 km/s
2065-01-11 01:44:00 Earth 0.1077 AU 41.9 LD 14.6 km/s
2066-07-11 04:08:00 Earth 0.1093 AU 42.5 LD 13 km/s
2072-06-12 21:45:00 Venus 0.1324 AU 51.5 LD 18.1 km/s
2079-01-07 14:41:00 Earth 0.1285 AU 50.0 LD 14.2 km/s
2080-07-08 06:30:00 Earth 0.0693 AU 27.0 LD 13.4 km/s

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

Sources