Skip to content
Public Universe
Comet

Lemmon

Add to an observing list or journal →

C/2013 G6 (Lemmon)

Lemmon is a comet in the Comet orbit class. Its orbit takes it from 2.05 AU to 771.7 AU from the Sun; one orbit takes 7,609.6 years. Orbit from the JPL solution of 15 April 2021.

Where is it now

Distance from Sun
29.308 AU
True anomaly
149.9°
Distance from Earth
28.33 AU
As of
25 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 Lemmon — 29.308 AU from the Sun Lemmon
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Lemmon is 28.33 AU from Earth today (3.9 light-hours).

In the sky

Right ascension
02h 30m 58s
Declination
+19° 54′ 34″
Constellation
Aries
Distance from Earth
28.33 AU
Elongation from the Sun
169.48° — near opposition — up most of the night

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
386.873 AU
Eccentricity
0.9947
Inclination
124.08°
Orbital period
7,609.6 years
Perihelion
2.048 AU
Aphelion
771.697 AU
Longitude of ascending node
44.57°
Argument of periapsis
215.69°
Epoch · J2000
2456461.5
Orbit class · COM
Comet
Earth MOID · 448.9 LD
1.1534 AU
Tisserand (Jupiter)
-0.98

Orbit quality

Observations used
230
Data arc
298 days
First observed
13 April 2013
Last observed
5 February 2014
Residual RMS
0.56 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
7.1
Total magnitude M₁ · K₁ 27
7.1

Discovery & classification

Also known as 2013 G6

Named

Sources