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Trans-Neptunian object

2017 DD170

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(2017 DD170)

Where is it now

Distance from Sun
38.117 AU
True anomaly
272.09°
Distance from Earth
39.098 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 DD170 — 38.117 AU from the Sun 2017 DD170
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2017 DD170 is 39.098 AU from Earth today (5.4 light-hours).

In the sky

Right ascension
13h 39m 06s
Declination
+00° 31′ 41″
Constellation
Virgo
Distance from Earth
39.1 AU
Elongation from the Sun
10.1° — too close to the Sun to observe

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
38.215 AU
Eccentricity
0.0357
Inclination
27.4°
Orbital period
236.2 years
Perihelion
36.853 AU
Aphelion
39.578 AU
Longitude of ascending node
182.11°
Argument of periapsis
110.88°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 13,984.8 LD
35.9347 AU
Tisserand (Jupiter)
4.945

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
19
Data arc
4.02 years
First observed
30 March 2015
Last observed
6 April 2019
Residual RMS
0.09 ″
Solution · Otto Matic
12 October 2024

Visual & observation

Absolute magnitude (H)
7.98

Discovery & classification

TNO

Sources