Skip to content
Public Universe
Trans-Neptunian object

2001 UA17

Add to an observing list or journal →

(2001 UA17)

Where is it now

Distance from Sun
41.563 AU
True anomaly
72.79°
Distance from Earth
40.743 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 2001 UA17 — 41.563 AU from the Sun 2001 UA17
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2001 UA17 is 40.743 AU from Earth today (5.6 light-hours).

In the sky

Right ascension
03h 54m 37s
Declination
+22° 33′ 24″
Constellation
Taurus
Distance from Earth
40.74 AU
Elongation from the Sun
145.69° — well clear of the Sun

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
43.248 AU
Eccentricity
0.1011
Inclination
5.06°
Orbital period
284.4 years
Perihelion
38.876 AU
Aphelion
47.62 AU
Longitude of ascending node
35.45°
Argument of periapsis
312.33°
Epoch · J2000
2452202.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,738.2 LD
37.8705 AU
Tisserand (Jupiter)
5.834

Orbit quality

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

Observations used
8
Data arc
4 days
First observed
17 October 2001
Last observed
21 October 2001
Residual RMS
0.11 ″
Solution · Otto Matic
6 June 2022

Visual & observation

Absolute magnitude (H)
7.07

Discovery & classification

TNO

Sources