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Trans-Neptunian object

2017 CN54

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(2017 CN54)

2017 CN54 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 41.42 AU to 55.24 AU from the Sun; one orbit takes 336 years. Orbit from the JPL solution of 18 April 2024.

Where is it now

Distance from Sun
41.626 AU
True anomaly
343.86°
Distance from Earth
42.28 AU
As of
26 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 — 0.994 AU from the Sun Earth 2017 CN54 — 41.626 AU from the Sun 2017 CN54
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2017 CN54 is 42.28 AU from Earth today (5.9 light-hours).

In the sky

Right ascension
10h 52m 44s
Declination
-02° 54′ 22″
Constellation
Leo
Distance from Earth
42.28 AU
Elongation from the Sun
48.5° — near the Sun — look low at dusk or dawn

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
48.333 AU
Eccentricity
0.143
Inclination
14.05°
Orbital period
336 years
Perihelion
41.421 AU
Aphelion
55.244 AU
Longitude of ascending node
206.23°
Argument of periapsis
333.64°
Epoch · J2000
2457813.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 15,734.6 LD
40.4308 AU
Tisserand (Jupiter)
5.96

Orbit quality

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

Observations used
15
Data arc
91 days
First observed
26 January 2017
Last observed
27 April 2017
Residual RMS
0.12 ″
Solution · Otto Matic
18 April 2024

Visual & observation

Absolute magnitude (H)
8.84

Discovery & classification

TNO

Sources