Skip to content
Public Universe
Asteroid Near-Earth Potentially hazardous

199003

Add to an observing list or journal →

199003 (2005 WJ56)

Where is it now

Distance from Sun
1.008 AU
True anomaly
242.23°
Distance from Earth
1.269 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 199003 — 1.008 AU from the Sun 199003
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 199003 is 1.269 AU from Earth today (10.6 light-minutes).

In the sky

Right ascension
10h 41m 42s
Declination
+08° 05′ 17″
Constellation
Leo
Distance from Earth
1.27 AU
Elongation from the Sun
51.16° — 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
0.959 AU
Eccentricity
0.152
Inclination
21.62°
Orbital period
343 days
Perihelion
0.813 AU
Aphelion
1.105 AU
Longitude of ascending node
288.01°
Argument of periapsis
297.66°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 8.8 LD
0.0226 AU
Tisserand (Jupiter)
6.215

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
1,303
Data arc
19 years
First observed
29 November 2005
Last observed
29 November 2024
Residual RMS
0.4 ″
Solution · Otto Matic
30 November 2024

Physical properties

Rotation period
4.38 hours

Visual & observation

Absolute magnitude (H)
18.16

Discovery & classification

Discovered by
LINEAR
Discovery date
29 November 2005
Discovery site
Socorro

Also known as 2005 WJ56

Aten Near-Earth Object Potentially Hazardous Asteroid

Close approaches 56 on record

Flyby geometry
Ecliptic flyby of 199003 at 2037-07-17 07:04 UTC Top-down view of the ecliptic, Earth at the centre, for the 2037-07-17 07:04 UTC close approach of 199003. Catalogue miss distance 52.3 LD · 2.01 × 10⁷ km. The curve is the geocentric path from 2037-07-14 to 2037-07-20, 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 52.3 LD · 2.01 × 10⁷ km 2037-07-17 07:04 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2037-07-17 07:04 UTC close approach of 199003. Catalogue miss distance 52.3 LD · 2.01 × 10⁷ km. The curve is the geocentric path from 2037-07-14 to 2037-07-20, 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
2030-12-04 00:51:00 Venus 0.1368 AU 53.2 LD 15.2 km/s
2037-07-17 07:04:00 Earth 0.1343 AU 52.3 LD 12.7 km/s
2039-01-09 20:24:00 Earth 0.0444 AU 17.3 LD 12.4 km/s
2048-10-06 16:49:00 Venus 0.1328 AU 51.7 LD 15 km/s
2052-07-26 11:46:00 Earth 0.1588 AU 61.8 LD 13.5 km/s
2054-01-10 01:34:00 Earth 0.055 AU 21.4 LD 11.5 km/s
2066-08-10 04:22:00 Venus 0.1338 AU 52.1 LD 14.9 km/s
2068-07-03 00:43:00 Earth 0.1765 AU 68.7 LD 12.3 km/s
2069-01-07 05:23:00 Earth 0.1976 AU 76.9 LD 11.3 km/s
2070-01-07 10:34:00 Earth 0.1702 AU 66.2 LD 14.7 km/s

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

Sources