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Comet

ATLAS

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P/2025 D4 (ATLAS)

Where is it now

Distance from Sun
5.365 AU
True anomaly
90.76°
Distance from Earth
5.546 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 ATLAS — 5.365 AU from the Sun ATLAS
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. ATLAS is 5.546 AU from Earth today (46.1 light-minutes).

In the sky

Right ascension
19h 00m 12s
Declination
-08° 52′ 38″
Constellation
Aquila
Distance from Earth
5.55 AU
Elongation from the Sun
74.18° — 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
8.901 AU
Eccentricity
0.6343
Inclination
15.94°
Orbital period
26.56 years
Perihelion
3.255 AU
Aphelion
14.548 AU
Longitude of ascending node
233.12°
Argument of periapsis
332.89°
Epoch · J2000
2460772.5
Orbit class · JFc
Jupiter-family comet (P < 20 y)
Earth MOID · 880.0 LD
2.2612 AU
Tisserand (Jupiter)
2.529

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
313
Data arc
626 days
First observed
10 December 2023
Last observed
27 August 2025
Residual RMS
0.48 ″
Solution · Otto Matic
9 September 2025

Visual & observation

Absolute magnitude (H)
5.8
Total magnitude M₁ · K₁ 20.8
5.8

Discovery & classification

Also known as 2025 D4

Named

Close approaches 4 on record

When (UTC) Body Distance Lunar distances Relative speed
2050-02-16 16:19:00 Juptr 1.4697 AU 572.0 LD 7.5 km/s
2080-02-06 23:33:00 Juptr 1.75 AU 681.0 LD 12.4 km/s
2161-02-03 02:48:00 Juptr 1.8796 AU 731.5 LD 8.8 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources