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Trans-Neptunian object

2016 SJ57

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(2016 SJ57)

Where is it now

Distance from Sun
33.9 AU
True anomaly
358.43°
Distance from Earth
33.102 AU
As of
15 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 SJ57 — 33.9 AU from the Sun 2016 SJ57
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2016 SJ57 is 33.102 AU from Earth today (4.6 light-hours).

In the sky

Right ascension
03h 51m 56s
Declination
+04° 07′ 21″
Constellation
Taurus
Distance from Earth
33.1 AU
Elongation from the Sun
143.28° — 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
36.539 AU
Eccentricity
0.0723
Inclination
15.31°
Orbital period
220.9 years
Perihelion
33.899 AU
Aphelion
39.179 AU
Longitude of ascending node
145.12°
Argument of periapsis
272.14°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 12,821.9 LD
32.9466 AU
Tisserand (Jupiter)
5.241

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
64
Data arc
5.1 years
First observed
27 October 2013
Last observed
1 December 2018
Residual RMS
0.15 ″
Solution · Otto Matic
18 April 2024

Visual & observation

Absolute magnitude (H)
7.41

Discovery & classification

TNO

Sources