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Comet

Hill

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375P/Hill

Where is it now

Distance from Sun
8.994 AU
True anomaly
189.65°
Distance from Earth
8.863 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 Hill — 8.994 AU from the Sun Hill
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Hill is 8.863 AU from Earth today (1.2 light-hours).

In the sky

Right ascension
20h 39m 47s
Declination
-32° 26′ 09″
Constellation
Microscopium
Distance from Earth
8.88 AU
Elongation from the Sun
93.57° — well clear of the Sun

Favours the southern hemisphere; low or below the horizon from far north.

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
5.567 AU
Eccentricity
0.66
Inclination
17.37°
Orbital period
13.13 years
Perihelion
1.893 AU
Aphelion
9.241 AU
Longitude of ascending node
359.97°
Argument of periapsis
119.43°
Epoch · J2000
2457232.5
Orbit class · JFc
Jupiter-family comet (P < 20 y)
Earth MOID · 378.6 LD
0.9728 AU
Tisserand (Jupiter)
2.418

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
313
Data arc
13.39 years
First observed
5 December 2005
Last observed
28 April 2019
Residual RMS
0.6 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
16.7
Total magnitude M₁ · K₁ 6
16.7

Discovery & classification

Also known as 375P · 375P/2006 D1 · 375P/2018 T1

Named

Close approaches 5 on record

When (UTC) Body Distance Lunar distances Relative speed
2069-11-28 05:46:00 Juptr 0.2762 AU 107.5 LD 11.1 km/s
2069-11-28 05:46:00 Jupiter 0.2762 AU 107.5 LD 11.1 km/s
2081-08-11 10:49:00 Juptr 0.9982 AU 388.5 LD 12.8 km/s

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

Sources