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Comet

Lemmon

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C/2024 D1 (Lemmon)

Lemmon is a comet in the Comet orbit class. Its orbit takes it from 6.7 AU to 11,951.27 AU from the Sun; one orbit takes 462,327.1 years. Orbit from the JPL solution of 22 October 2026.

Where is it now

Distance from Sun
7.208 AU
True anomaly
329.06°
Distance from Earth
6.836 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 — 7.208 AU from the Sun Lemmon
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Lemmon is 6.836 AU from Earth today (56.9 light-minutes).

In the sky

Right ascension
06h 24m 16s
Declination
+74° 16′ 24″
Constellation
Camelopardalis
Distance from Earth
6.83 AU
Elongation from the Sun
108.59° — 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
5,978.985 AU
Eccentricity
0.9989
Inclination
132.46°
Orbital period
462,327.1 years
Perihelion
6.696 AU
Aphelion
11,951.274 AU
Longitude of ascending node
179.67°
Argument of periapsis
125.76°
Epoch · J2000
2460629.5
Orbit class · COM
Comet
Earth MOID · 2,300.1 LD
5.9102 AU
Tisserand (Jupiter)
-2.164

Orbit quality

Observations used
84
Data arc
2.81 years
First observed
27 December 2023
Last observed
17 October 2026
Residual RMS
0.55 ″
Solution · Otto Matic
22 October 2026

Visual & observation

Absolute magnitude (H)
7.6
Total magnitude M₁ · K₁ 8.8
7.6

Discovery & classification

Also known as 2024 D1

Named

Sources