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Comet

ATLAS

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C/2019 T4 (ATLAS)

ATLAS is a comet in the Comet orbit class. Its orbit takes it from 4.24 AU to 1,933.3 AU from the Sun; one orbit takes 30,153.6 years. Orbit from the JPL solution of 30 September 2025.

Where is it now

Distance from Sun
12.172 AU
True anomaly
107.81°
Distance from Earth
12.186 AU
As of
25 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 ATLAS — 12.172 AU from the Sun ATLAS
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. ATLAS is 12.186 AU from Earth today (1.7 light-hours).

In the sky

Right ascension
19h 15m 28s
Declination
+30° 54′ 42″
Constellation
Lyra
Distance from Earth
12.19 AU
Elongation from the Sun
86.72° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
968.77 AU
Eccentricity
0.9956
Inclination
53.63°
Orbital period
30,153.6 years
Perihelion
4.242 AU
Aphelion
1,933.298 AU
Longitude of ascending node
199.94°
Argument of periapsis
351.18°
Epoch · J2000
2459989.5
Orbit class · COM
Comet
Earth MOID · 1,264.1 LD
3.2483 AU
Tisserand (Jupiter)
1.518

Orbit quality

Observations used
5,476
Data arc
6.54 years
First observed
5 February 2019
Last observed
22 August 2025
Residual RMS
0.46 ″
Solution · Otto Matic
30 September 2025

Visual & observation

Absolute magnitude (H)
4.4
Total magnitude M₁ · K₁ 10.3
4.4

Discovery & classification

Also known as 2019 T4

Named

Sources