Skip to content
Public Universe
Trans-Neptunian object

2013 SJ112

Add to an observing list or journal →

(2013 SJ112)

Where is it now

Distance from Sun
43.778 AU
True anomaly
278.1°
Distance from Earth
42.791 AU
As of
20 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 — 0.996 AU from the Sun Earth 2013 SJ112 — 43.778 AU from the Sun 2013 SJ112
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2013 SJ112 is 42.791 AU from Earth today (5.9 light-hours).

In the sky

Right ascension
01h 23m 08s
Declination
+04° 39′ 39″
Constellation
Pisces
Distance from Earth
42.79 AU
Elongation from the Sun
171.95° — near opposition — up most of the night

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
43.836 AU
Eccentricity
0.0088
Inclination
3.84°
Orbital period
290.2 years
Perihelion
43.448 AU
Aphelion
44.224 AU
Longitude of ascending node
95.93°
Argument of periapsis
7.05°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 16,526.2 LD
42.465 AU
Tisserand (Jupiter)
5.91

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
20
Data arc
9.08 years
First observed
29 September 2013
Last observed
29 October 2022
Residual RMS
0.19 ″
Solution · Otto Matic
18 December 2023

Visual & observation

Absolute magnitude (H)
7.2

Discovery & classification

TNO

Sources