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Trans-Neptunian object

2021 DL1

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(2021 DL1)

Where is it now

Distance from Sun
12.311 AU
True anomaly
116.52°
Distance from Earth
11.471 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 2021 DL1 — 12.311 AU from the Sun 2021 DL1
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2021 DL1 is 11.471 AU from Earth today (1.6 light-hours).

In the sky

Right ascension
01h 47m 24s
Declination
-24° 33′ 54″
Constellation
Fornax
Distance from Earth
11.47 AU
Elongation from the Sun
146.09° — well clear of the Sun

Favours the southern hemisphere; low or below the horizon from far north.

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
34.489 AU
Eccentricity
0.8856
Inclination
148.58°
Orbital period
202.6 years
Perihelion
3.947 AU
Aphelion
65.032 AU
Longitude of ascending node
270.09°
Argument of periapsis
140.34°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 1,178.6 LD
3.0285 AU
Tisserand (Jupiter)
-1.89

Orbit quality

Orbit very well determined (uncertainty code 2).

Observations used
151
Data arc
3.69 years
First observed
6 May 2019
Last observed
13 January 2023
Residual RMS
0.58 ″
Solution · Otto Matic
20 January 2023

Visual & observation

Absolute magnitude (H)
14.12

Discovery & classification

TNO

Sources