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Comet Near-Earth

ATLAS

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C/2019 Y4-D (ATLAS)

Where is it now

Distance from Sun
17.334 AU
True anomaly
169.07°
Distance from Earth
17.41 AU
As of
11 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 — 0.998 AU from the Sun Earth ATLAS — 17.334 AU from the Sun ATLAS
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. ATLAS is 17.41 AU from Earth today (2.4 light-hours).

In the sky

Right ascension
07h 39m 05s
Declination
+12° 10′ 39″
Constellation
Canis Minor
Distance from Earth
17.4 AU
Elongation from the Sun
84.56° — well clear of the Sun

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
22.584 AU
Eccentricity
0.9887
Inclination
44.82°
Orbital period
107.3 years
Perihelion
0.255 AU
Aphelion
44.913 AU
Longitude of ascending node
120.58°
Argument of periapsis
177.8°
Epoch · J2000
2458952.5
Orbit class · HTC
Halley-type comet
Earth MOID · 243.4 LD
0.6254 AU
Tisserand (Jupiter)
0.673

Orbit quality

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

Observations used
75
Data arc
8 days
First observed
9 April 2020
Last observed
17 April 2020
Residual RMS
0.92 ″
Solution · Davide Farnocchia
13 July 2026

Visual & observation

Absolute magnitude (H)
13.5
Total magnitude M₁ · K₁ 4.5
13.5

Discovery & classification

Also known as 2019 Y4-D

Near-Earth Object Named

Sources