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Trans-Neptunian object

2016 SZ57

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(2016 SZ57)

Where is it now

Distance from Sun
41.135 AU
True anomaly
115.92°
Distance from Earth
40.238 AU
As of
16 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 — 0.997 AU from the Sun Earth 2016 SZ57 — 41.135 AU from the Sun 2016 SZ57
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2016 SZ57 is 40.238 AU from Earth today (5.6 light-hours).

In the sky

Right ascension
03h 06m 05s
Declination
+00° 57′ 10″
Constellation
Cetus
Distance from Earth
40.23 AU
Elongation from the Sun
154.57° — 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
39.505 AU
Eccentricity
0.125
Inclination
16.73°
Orbital period
248.3 years
Perihelion
34.566 AU
Aphelion
44.443 AU
Longitude of ascending node
111.24°
Argument of periapsis
175.82°
Epoch · J2000
2457267.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 13,057.0 LD
33.5506 AU
Tisserand (Jupiter)
5.368

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 8).

Observations used
12
Data arc
676 days
First observed
23 November 2014
Last observed
29 September 2016
Residual RMS
0.03 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
7.9

Discovery & classification

Also known as 2014 WK517

TNO

Sources