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Comet

ATLAS

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P/2025 C1 (ATLAS)

Where is it now

Distance from Sun
4.225 AU
True anomaly
111.32°
Distance from Earth
4.203 AU
As of
22 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.995 AU from the Sun Earth ATLAS — 4.225 AU from the Sun ATLAS
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. ATLAS is 4.203 AU from Earth today (35.0 light-minutes).

In the sky

Right ascension
19h 48m 07s
Declination
-27° 52′ 17″
Constellation
Sagittarius
Distance from Earth
4.21 AU
Elongation from the Sun
83.98° — 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
4.195 AU
Eccentricity
0.3454
Inclination
7.52°
Orbital period
8.59 years
Perihelion
2.746 AU
Aphelion
5.644 AU
Longitude of ascending node
9.1°
Argument of periapsis
186.79°
Epoch · J2000
2460733.5
Orbit class · JFc
Jupiter-family comet (P < 20 y)
Earth MOID · 679.2 LD
1.7452 AU
Tisserand (Jupiter)
2.911

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
385
Data arc
130 days
First observed
2 February 2025
Last observed
12 June 2025
Residual RMS
0.67 ″
Solution · Otto Matic
30 September 2025

Visual & observation

Absolute magnitude (H)
6.9
Total magnitude M₁ · K₁ 20.3
6.9

Discovery & classification

Also known as 2025 C1

Named

Close approaches 9 on record

When (UTC) Body Distance Lunar distances Relative speed
2047-07-07 16:53:00 Juptr 0.5869 AU 228.4 LD 4.1 km/s
2104-09-12 17:03:00 Juptr 0.1408 AU 54.8 LD 6 km/s
2104-09-12 17:03:00 Jupiter 0.1408 AU 54.8 LD 6 km/s
2116-06-04 13:42:00 Juptr 0.3086 AU 120.1 LD 4.7 km/s
2116-06-04 13:42:00 Jupiter 0.3086 AU 120.1 LD 4.7 km/s

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

Sources