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Asteroid Near-Earth

2010 SJ

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(2010 SJ)

Where is it now

Distance from Sun
0.929 AU
True anomaly
257.73°
Distance from Earth
0.489 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 2010 SJ — 0.929 AU from the Sun 2010 SJ
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2010 SJ is 0.489 AU from Earth today (4.1 light-minutes).

In the sky

Right ascension
09h 16m 19s
Declination
-02° 29′ 14″
Constellation
Hydra
Distance from Earth
0.49 AU
Elongation from the Sun
67.67° — well clear of the Sun

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
0.921 AU
Eccentricity
0.166
Inclination
11.31°
Orbital period
323 days
Perihelion
0.768 AU
Aphelion
1.074 AU
Longitude of ascending node
183.34°
Argument of periapsis
335.66°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 19.1 LD
0.049 AU
Tisserand (Jupiter)
6.461

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
74
Data arc
20 days
First observed
16 September 2010
Last observed
6 October 2010
Residual RMS
0.33 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
23.8

Discovery & classification

Aten Near-Earth Object

Close approaches 129 on record

Flyby geometry
Ecliptic flyby of 2010 SJ at 2032-07-31 08:57 UTC Top-down view of the ecliptic, Earth at the centre, for the 2032-07-31 08:57 UTC close approach of 2010 SJ. Catalogue miss distance 173.0 LD · 6.65 × 10⁷ km. The curve is the geocentric path from 2032-07-28 to 2032-08-03, 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. At closest approach the object is north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 173.0 LD · 6.65 × 10⁷ km 2032-07-31 08:57 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2032-07-31 08:57 UTC close approach of 2010 SJ. Catalogue miss distance 173.0 LD · 6.65 × 10⁷ km. The curve is the geocentric path from 2032-07-28 to 2032-08-03, 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. At closest approach the object is north 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
2026-10-06 17:40:00 Earth 0.4953 AU 192.8 LD 19.4 km/s
2032-07-31 08:57:00 Earth 0.4446 AU 173.0 LD 16.2 km/s
2033-03-26 13:51:00 Venus 0.1442 AU 56.1 LD 10.9 km/s
2033-04-09 10:21:00 Earth 0.2116 AU 82.4 LD 8.7 km/s
2033-10-09 17:06:00 Earth 0.0846 AU 32.9 LD 7.5 km/s
2040-08-02 22:46:00 Earth 0.2257 AU 87.8 LD 8.3 km/s
2041-02-21 15:30:00 Earth 0.2375 AU 92.4 LD 8.8 km/s
2041-10-11 14:07:00 Earth 0.3351 AU 130.4 LD 14.5 km/s
2047-05-20 18:25:00 Venus 0.0932 AU 36.3 LD 9.3 km/s
2048-05-08 02:04:00 Earth 0.2081 AU 81.0 LD 7.3 km/s

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

Sources