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Trans-Neptunian object

1997 CW29

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(1997 CW29)

Where is it now

Distance from Sun
41.754 AU
True anomaly
217.16°
Distance from Earth
42.402 AU
As of
16 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 — 0.997 AU from the Sun Earth 1997 CW29 — 41.754 AU from the Sun 1997 CW29
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 1997 CW29 is 42.402 AU from Earth today (5.9 light-hours).

In the sky

Right ascension
10h 51m 07s
Declination
+21° 39′ 12″
Constellation
Leo
Distance from Earth
42.39 AU
Elongation from the Sun
49.56° — near the Sun — look low at dusk or dawn

Favours the northern hemisphere; low or below the horizon from far south.

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
39.375 AU
Eccentricity
0.0788
Inclination
18.98°
Orbital period
247.1 years
Perihelion
36.27 AU
Aphelion
42.48 AU
Longitude of ascending node
110.69°
Argument of periapsis
188.49°
Epoch · J2000
2450491.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 13,720.1 LD
35.2546 AU
Tisserand (Jupiter)
5.319

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 9).

Observations used
11
Data arc
27 days
First observed
8 February 1997
Last observed
7 March 1997
Residual RMS
0.74 ″
Solution · Otto Matic
14 April 2021

Visual & observation

Absolute magnitude (H)
6.5

Discovery & classification

TNO

Sources