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Comet

LONEOS

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450P/LONEOS

Where is it now

Distance from Sun
5.478 AU
True anomaly
352.13°
Distance from Earth
5.849 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.994 AU from the Sun Earth LONEOS — 5.478 AU from the Sun LONEOS
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. LONEOS is 5.849 AU from Earth today (48.6 light-minutes).

In the sky

Right ascension
10h 03m 44s
Declination
+14° 24′ 40″
Constellation
Leo
Distance from Earth
5.85 AU
Elongation from the Sun
63.61° — well clear of the Sun

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
7.936 AU
Eccentricity
0.3114
Inclination
10.56°
Orbital period
22.36 years
Perihelion
5.465 AU
Aphelion
10.407 AU
Longitude of ascending node
124.9°
Argument of periapsis
21.73°
Epoch · J2000
2458149.5
Orbit class · JFc
Jupiter-family comet (P < 20 y)
Earth MOID · 1,743.6 LD
4.4804 AU
Tisserand (Jupiter)
2.963

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
965
Data arc
22.92 years
First observed
25 October 2003
Last observed
25 September 2026
Residual RMS
0.65 ″
Solution · Otto Matic
28 September 2026

Visual & observation

Absolute magnitude (H)
6.8
Total magnitude M₁ · K₁ 11.3
6.8

Discovery & classification

Also known as 450P · 450P/2004 A1 · 450P/2022 Q3

Named

Close approaches 6 on record

When (UTC) Body Distance Lunar distances Relative speed
2031-03-24 06:21:00 Juptr 1.5183 AU 590.9 LD 2.4 km/s
2071-12-11 08:09:00 Juptr 1.9046 AU 741.2 LD 2.2 km/s
2077-01-05 13:54:00 Juptr 1.4514 AU 564.8 LD 4.7 km/s

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

Sources