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Solar
Trans-Neptunian object

530930

530930 (2011 WG157)

Where is it now

Distance from Sun
30.577 AU
True anomaly
238.89°
Distance from Earth
30.209 AU
As of
2 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 — 1.001 AU from the Sun Earth 530930 — 30.577 AU from the Sun 530930
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 530930 is 30.209 AU from Earth today (4.2 light-hours).

In the sky

Right ascension
04h 51m 54s
Declination
+45° 07′ 01″
Constellation
Auriga
Distance from Earth
30.2 AU
Elongation from the Sun
111.28° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

From your location

See how high it is right now, whether it's up after dark, 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
30.192 AU
Eccentricity
0.0256
Inclination
22.3°
Orbital period
165.9 years
Perihelion
29.42 AU
Aphelion
30.965 AU
Longitude of ascending node
352.22°
Argument of periapsis
204.63°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 11,064.7 LD
28.4314 AU
Tisserand (Jupiter)
4.628

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
92
Data arc
17.3 years
First observed
21 September 2004
Last observed
10 January 2022
Residual RMS
0.44 ″
Solution · Otto Matic
13 April 2022

Visual & observation

Absolute magnitude (H)
7.27

Discovery & classification

Discovered by
Pan-STARRS 1
Discovery date
20 November 2011
Discovery site
Haleakala

Also known as 2011 WG157

TNO

Sources