Skip to content
Public Universe
Trans-Neptunian object

1999 CK158

Add to an observing list or journal →

(1999 CK158)

Where is it now

Distance from Sun
40.457 AU
True anomaly
84.66°
Distance from Earth
41.24 AU
As of
17 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 1999 CK158 — 40.457 AU from the Sun 1999 CK158
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 1999 CK158 is 41.24 AU from Earth today (5.7 light-hours).

In the sky

Right ascension
11h 32m 59s
Declination
+14° 42′ 27″
Constellation
Leo
Distance from Earth
41.23 AU
Elongation from the Sun
38.43° — 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
40.969 AU
Eccentricity
0.075
Inclination
17.06°
Orbital period
262.2 years
Perihelion
37.899 AU
Aphelion
44.04 AU
Longitude of ascending node
127.65°
Argument of periapsis
316.02°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,374.1 LD
36.935 AU
Tisserand (Jupiter)
5.477

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
21
Data arc
25.09 years
First observed
10 February 1999
Last observed
13 March 2024
Residual RMS
0.15 ″
Solution · Otto Matic
15 April 2024

Visual & observation

Absolute magnitude (H)
8.2

Discovery & classification

TNO

Sources