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Trans-Neptunian object

2017 DN164

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(2017 DN164)

Where is it now

Distance from Sun
39.448 AU
True anomaly
219.14°
Distance from Earth
40.243 AU
As of
15 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 2017 DN164 — 39.448 AU from the Sun 2017 DN164
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2017 DN164 is 40.243 AU from Earth today (5.6 light-hours).

In the sky

Right ascension
11h 00m 26s
Declination
+00° 31′ 00″
Constellation
Leo
Distance from Earth
40.23 AU
Elongation from the Sun
37.54° — 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
37.856 AU
Eccentricity
0.0559
Inclination
20.53°
Orbital period
232.9 years
Perihelion
35.741 AU
Aphelion
39.972 AU
Longitude of ascending node
180.11°
Argument of periapsis
125°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 13,531.1 LD
34.7688 AU
Tisserand (Jupiter)
5.182

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
46
Data arc
684 days
First observed
4 March 2016
Last observed
17 January 2018
Residual RMS
0.14 ″
Solution · Otto Matic
2 July 2025

Visual & observation

Absolute magnitude (H)
9.55

Discovery & classification

TNO

Sources