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Trans-Neptunian object

2009 DR143

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(2009 DR143)

2009 DR143 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 39.5 AU to 54.24 AU from the Sun; one orbit takes 320.9 years. Orbit from the JPL solution of 7 July 2021.

Where is it now

Distance from Sun
44.384 AU
True anomaly
280.97°
Distance from Earth
45.362 AU
As of
24 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 — 0.994 AU from the Sun Earth 2009 DR143 — 44.384 AU from the Sun 2009 DR143
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2009 DR143 is 45.362 AU from Earth today (6.3 light-hours).

In the sky

Right ascension
13h 43m 17s
Declination
-02° 09′ 50″
Constellation
Virgo
Distance from Earth
45.36 AU
Elongation from the Sun
10.87° — 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
46.872 AU
Eccentricity
0.1573
Inclination
9.56°
Orbital period
320.9 years
Perihelion
39.501 AU
Aphelion
54.244 AU
Longitude of ascending node
82.67°
Argument of periapsis
200.56°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,977.6 LD
38.4857 AU
Tisserand (Jupiter)
5.957

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
28
Data arc
12.23 years
First observed
18 February 2009
Last observed
12 May 2021
Residual RMS
0.18 ″
Solution · Otto Matic
7 July 2021

Visual & observation

Absolute magnitude (H)
7.54

Discovery & classification

TNO

Sources