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Solar
Trans-Neptunian object

2013 RC158

(2013 RC158)

Where is it now

Distance from Sun
30.958 AU
True anomaly
239.87°
Distance from Earth
30.138 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 2013 RC158 — 30.958 AU from the Sun 2013 RC158
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2013 RC158 is 30.138 AU from Earth today (4.2 light-hours).

In the sky

Right ascension
02h 54m 53s
Declination
+11° 45′ 39″
Constellation
Aries
Distance from Earth
30.13 AU
Elongation from the Sun
145.15° — well clear of the Sun

Visible from both hemispheres.

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
30.17 AU
Eccentricity
0.057
Inclination
7.44°
Orbital period
165.7 years
Perihelion
28.45 AU
Aphelion
31.89 AU
Longitude of ascending node
81.61°
Argument of periapsis
81.99°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 10,689.5 LD
27.4672 AU
Tisserand (Jupiter)
4.94

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
16
Data arc
8.15 years
First observed
12 September 2013
Last observed
5 November 2021
Residual RMS
0.18 ″
Solution · Otto Matic
13 November 2021

Visual & observation

Absolute magnitude (H)
8.87

Discovery & classification

TNO

Sources