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Comet

LONEOS-Tucker

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328P/LONEOS-Tucker

Where is it now

Distance from Sun
5.352 AU
True anomaly
145.3°
Distance from Earth
6.02 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 LONEOS-Tucker — 5.352 AU from the Sun LONEOS-Tucker
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. LONEOS-Tucker is 6.02 AU from Earth today (50.1 light-minutes).

In the sky

Right ascension
11h 07m 24s
Declination
+06° 48′ 54″
Constellation
Leo
Distance from Earth
6.02 AU
Elongation from the Sun
44.67° — 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
4.204 AU
Eccentricity
0.5513
Inclination
17.65°
Orbital period
8.62 years
Perihelion
1.886 AU
Aphelion
6.521 AU
Longitude of ascending node
341.6°
Argument of periapsis
30.62°
Epoch · J2000
2457124.5
Orbit class · JFc
Jupiter-family comet (P < 20 y)
Earth MOID · 352.0 LD
0.9046 AU
Tisserand (Jupiter)
2.667

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
609
Data arc
26.27 years
First observed
27 August 1998
Last observed
2 December 2024
Residual RMS
0.82 ″
Solution · Otto Matic
26 December 2024

Visual & observation

Absolute magnitude (H)
4.4
Total magnitude M₁ · K₁ 44.3
4.4

Discovery & classification

Also known as 328P · 328P/1998 QP54 · 328P/2015 S1

Named

Close approaches 11 on record

When (UTC) Body Distance Lunar distances Relative speed
2028-08-22 07:11:00 Juptr 1.4449 AU 562.3 LD 5.5 km/s
2087-04-03 13:58:00 Juptr 0.9623 AU 374.5 LD 5.6 km/s
2111-01-08 11:37:00 Juptr 1.9147 AU 745.1 LD 11.6 km/s
2147-07-29 19:20:00 Juptr 1.4925 AU 580.9 LD 5.4 km/s
2169-12-11 12:52:00 Jupiter 0.4776 AU 185.9 LD 8.1 km/s
2169-12-11 12:52:00 Juptr 0.4776 AU 185.9 LD 8.1 km/s

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

Sources