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Comet

PANSTARRS

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C/2020 K4 (PANSTARRS)

PANSTARRS is a comet in the Comet orbit class. Its orbit takes it from 1.77 AU to 89.65 AU from the Sun; one orbit takes 309.1 years. Orbit from the JPL solution of 15 April 2021.

Where is it now

Distance from Sun
17.337 AU
True anomaly
146.27°
Distance from Earth
17.753 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 PANSTARRS — 17.337 AU from the Sun PANSTARRS
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. PANSTARRS is 17.753 AU from Earth today (2.5 light-hours).

In the sky

Right ascension
13h 08m 00s
Declination
+50° 57′ 54″
Constellation
Canes Venatici
Distance from Earth
17.75 AU
Elongation from the Sun
64.05° — 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
45.712 AU
Eccentricity
0.9612
Inclination
125.91°
Orbital period
309.1 years
Perihelion
1.773 AU
Aphelion
89.651 AU
Longitude of ascending node
264.11°
Argument of periapsis
310.29°
Epoch · J2000
2459016.5
Orbit class · COM
Comet
Earth MOID · 373.6 LD
0.9599 AU
Tisserand (Jupiter)
-0.845

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
48
Data arc
117 days
First observed
20 May 2020
Last observed
14 September 2020
Residual RMS
0.16 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
17.9
Total magnitude M₁ · K₁ 6.3
17.9

Discovery & classification

Also known as 2020 K4

Named

Sources