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Comet

PANSTARRS

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P/2015 P4 (PANSTARRS)

Where is it now

Distance from Sun
8.246 AU
True anomaly
208.2°
Distance from Earth
9.154 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 — 8.246 AU from the Sun PANSTARRS
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. PANSTARRS is 9.154 AU from Earth today (1.3 light-hours).

In the sky

Right ascension
15h 23m 06s
Declination
-12° 16′ 51″
Constellation
Libra
Distance from Earth
9.16 AU
Elongation from the Sun
22.18° — near the Sun — look low at dusk or dawn

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
6.074 AU
Eccentricity
0.5842
Inclination
8.71°
Orbital period
14.97 years
Perihelion
2.525 AU
Aphelion
9.622 AU
Longitude of ascending node
104.75°
Argument of periapsis
280.82°
Epoch · J2000
2457286.5
Orbit class · JFc
Jupiter-family comet (P < 20 y)
Earth MOID · 602.2 LD
1.5474 AU
Tisserand (Jupiter)
2.59

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
80
Data arc
140 days
First observed
24 July 2015
Last observed
11 December 2015
Residual RMS
0.54 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
6.5
Total magnitude M₁ · K₁ 28
6.5

Discovery & classification

Also known as 2015 P4

Named

Close approaches 7 on record

When (UTC) Body Distance Lunar distances Relative speed
2043-11-24 09:51:00 Juptr 1.4697 AU 572.0 LD 4.4 km/s
2090-10-08 03:05:00 Juptr 0.9164 AU 356.6 LD 10.1 km/s
2101-08-05 08:41:00 Satrn 1.1645 AU 453.2 LD 4.2 km/s
2130-11-12 23:14:00 Satrn 1.6323 AU 635.2 LD 5 km/s

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

Sources