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Comet

PANSTARRS

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P/2018 L4 (PANSTARRS)

Where is it now

Distance from Sun
6.662 AU
True anomaly
208.15°
Distance from Earth
6.994 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 PANSTARRS — 6.662 AU from the Sun PANSTARRS
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. PANSTARRS is 6.994 AU from Earth today (58.2 light-minutes).

In the sky

Right ascension
09h 34m 42s
Declination
+09° 17′ 28″
Constellation
Leo
Distance from Earth
6.98 AU
Elongation from the Sun
67.28° — 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
4.935 AU
Eccentricity
0.6603
Inclination
26.63°
Orbital period
10.96 years
Perihelion
1.676 AU
Aphelion
8.194 AU
Longitude of ascending node
145.19°
Argument of periapsis
140.43°
Epoch · J2000
2458298.5
Orbit class · JFc
Jupiter-family comet (P < 20 y)
Earth MOID · 282.7 LD
0.7265 AU
Tisserand (Jupiter)
2.362

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
129
Data arc
149 days
First observed
19 May 2018
Last observed
15 October 2018
Residual RMS
0.56 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
15
Total magnitude M₁ · K₁ 21.3
15

Discovery & classification

Also known as 2018 L4

Named

Close approaches 3 on record

When (UTC) Body Distance Lunar distances Relative speed
2027-06-17 14:35:00 Juptr 0.8606 AU 334.9 LD 8.6 km/s
2039-03-04 08:35:00 Jupiter 0.225 AU 87.6 LD 11.1 km/s
2039-03-04 08:35:00 Juptr 0.225 AU 87.6 LD 11.1 km/s

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

Sources