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Comet

Hill

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369P/Hill

Where is it now

Distance from Sun
3.816 AU
True anomaly
248.38°
Distance from Earth
3.782 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 — 3.816 AU from the Sun Hill
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. Hill is 3.782 AU from Earth today (31.5 light-minutes).

In the sky

Right ascension
19h 50m 41s
Declination
-31° 27′ 54″
Constellation
Sagittarius
Distance from Earth
3.79 AU
Elongation from the Sun
83.88° — 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
4.385 AU
Eccentricity
0.5546
Inclination
10.32°
Orbital period
9.18 years
Perihelion
1.953 AU
Aphelion
6.817 AU
Longitude of ascending node
47.37°
Argument of periapsis
13.33°
Epoch · J2000
2457084.5
Orbit class · JFc
Jupiter-family comet (P < 20 y)
Earth MOID · 376.4 LD
0.9672 AU
Tisserand (Jupiter)
2.69

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
404
Data arc
9.23 years
First observed
6 January 2010
Last observed
1 April 2019
Residual RMS
0.66 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
15.9
Total magnitude M₁ · K₁ 4.5
15.9

Discovery & classification

Also known as 369P · 369P/2010 A1 · 369P/2018 P1

Named

Close approaches 10 on record

When (UTC) Body Distance Lunar distances Relative speed
2043-08-01 17:54:00 Juptr 1.0973 AU 427.0 LD 5.2 km/s
2076-09-13 08:37:00 Jupiter 0.209 AU 81.3 LD 7.2 km/s
2076-09-13 08:37:00 Juptr 0.209 AU 81.3 LD 7.2 km/s
2091-04-12 04:11:00 Juptr 1.4354 AU 558.6 LD 7.8 km/s
2124-07-13 10:17:00 Juptr 1.0836 AU 421.7 LD 5.3 km/s
2159-11-05 17:27:00 Juptr 1.0761 AU 418.8 LD 9.3 km/s
2174-05-05 16:48:00 Juptr 1.3015 AU 506.5 LD 5.4 km/s

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

Sources