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Comet

Lemmon-PANSTARRS

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457P/Lemmon-PANSTARRS

Where is it now

Distance from Sun
2.963 AU
True anomaly
178.57°
Distance from Earth
2.979 AU
As of
11 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 — 0.998 AU from the Sun Earth Lemmon-PANSTARRS — 2.963 AU from the Sun Lemmon-PANSTARRS
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Lemmon-PANSTARRS is 2.979 AU from Earth today (24.8 light-minutes).

In the sky

Right ascension
08h 00m 47s
Declination
+15° 22′ 30″
Constellation
Cancer
Distance from Earth
2.97 AU
Elongation from the Sun
79.91° — 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
2.646 AU
Eccentricity
0.1198
Inclination
5.22°
Orbital period
4.31 years
Perihelion
2.329 AU
Aphelion
2.963 AU
Longitude of ascending node
176.01°
Argument of periapsis
104.95°
Epoch · J2000
2458952.5
Orbit class · ETc
Encke-type comet
Earth MOID · 513.5 LD
1.3196 AU
Tisserand (Jupiter)
3.376

Orbit quality

Orbit very well determined (uncertainty code 1).

Observations used
136
Data arc
9.13 years
First observed
19 April 2015
Last observed
6 June 2024
Residual RMS
0.43 ″
Solution · Otto Matic
2 January 2025

Visual & observation

Absolute magnitude (H)
6.8
Total magnitude M₁ · K₁ 36.3
6.8

Discovery & classification

Also known as 457P · 457P/2016 N7 · 457P/2020 O1

Named

Sources