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Trans-Neptunian object

1999 CZ131

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(1999 CZ131)

Where is it now

Distance from Sun
44.12 AU
True anomaly
116.49°
Distance from Earth
45.055 AU
As of
19 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 CZ131 — 44.12 AU from the Sun 1999 CZ131
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 1999 CZ131 is 45.055 AU from Earth today (6.2 light-hours).

In the sky

Right ascension
12h 26m 15s
Declination
-01° 22′ 51″
Constellation
Virgo
Distance from Earth
45.05 AU
Elongation from the Sun
20.65° — 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
43.371 AU
Eccentricity
0.042
Inclination
2.42°
Orbital period
285.6 years
Perihelion
41.55 AU
Aphelion
45.191 AU
Longitude of ascending node
151.77°
Argument of periapsis
277.88°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 15,786.7 LD
40.5648 AU
Tisserand (Jupiter)
5.884

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
20
Data arc
20.07 years
First observed
11 February 1999
Last observed
8 March 2019
Residual RMS
0.13 ″
Solution · Otto Matic
10 December 2024

Visual & observation

Absolute magnitude (H)
7.9

Discovery & classification

TNO

Sources