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Comets » 

Comet 310P/Hill

Above the horizon.  Rise: 10:54 | Tran: 18:42 | Set: 2:34
Alt: 34.97°   Az: 258.34°   Direction: West-South-West

Comet 310P/Hill is in the constellation of Leo, at a distance of 639,471,876.0 kilometers from Earth. The current Right Ascension is 09h 53m 08s and the Declination is +20° 11’ 37” (apparent coordinates). The predicted magnitude of Comet 310P/Hill is 24.32 (data provided by JPL Horizons).

Finder Charts

Map showing Comet 310P/Hill in Leo on May, 24 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Comet 310P/Hill in Leo on May, 24 2025. Field of view: 15x9 degrees. View in interactive sky chart

High precision deep sky finder chart, 60 arcmin wide, showing where Comet 310P/Hill is right now. Click on the image to see a more detailed fullscreen tracker view.

310P/Hill
RA: 09h 51m 43s
Dec: +20° 18’ 50”
Deep sky finder chart for Comet 310P/Hill. Field of view: 60x40 arcmins. View in deep sky object tracker

Also check out Where is Comet 310P/Hill?, a page that provides all the information needed to find Comet 310P/Hill in the sky and additional links to sky charts.

Celestial Coordinates

Apparent

09h 53m 08s
+20° 11’ 37”
03h 55m 05s
13h 48m 14s

J2000

09h 51m 43s
+20° 18’ 50”

Additional Information

Leo
n/a
n/a
n/a
n/a
24.32

The observed values of Magnitude, Coma Diameter and Tail Length are derived from the most recent observation recorded at the Comet Observers Database. The value of Predicted Magnitude comes from the JPL Horizons ephemerides service and, in the case of comets, might be inaccurate given the highly dynamic and unpredictable behavior of these objects. When available, please refer to the Observed Magnitude value and consider the Predicted Magnitude as a directional indication. We acknowledge with thanks the comet observations from the COBS Comet Observation Database contributed by observers worldwide and used in this table to report recent comet observations.

Rise and Set Times

Today's rise, transit and set times of Comet 310P/Hill from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 69.8°
Max altitude: 58.7°
Azimuth: 290.3°
  • 310P/Hill is above the horizon from Greenwich, UK.
  • Right now it is placed in the West-South-West direction at an altitude of 34.97° above the horizon.
  • Given its current magnitude, 310P/Hill is visible only through long exposure photography.
  • Go to interactive sky chart

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Distance from Earth

The distance of Comet 310P/Hill from Earth is currently 639,471,876.0 kilometers, equivalent to 4.2746054674 Astronomical Units. Light takes 35m 33.049s to travel from Comet 310P/Hill and arrive to us.

639,471,876.0
4.2746054674
35m 33.049s

The following chart shows the distance of Comet 310P/Hill from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Chart of the distance of Comet 310P/Hill from Earth in Astronomical Units (au)

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 310P/Hill from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach

Between 1 January 2000 and 31 December 2099, the closest approach of Comet 310P/Hill to Earth happens on Thu Oct 22 2065 at a distance of 1.280591 Astronomical Units, or 191,573,654 kilometers:

Thu Oct 22 2065
191,573,654
1.280591

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 310P/Hill, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Chart of the magnitude of Comet 310P/Hill as a function of time

Orbital Elements

The following table lists the orbital elements of Comet 310P/Hill at epoch 11 May 2009 00:00 UTC (JD: 2454963.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.42511062
Orbit inclination i 13.18546593°
Perihelion distance q 2.39441496 AU
358,199,381 km
Aphelion distance Q 5.93558741 AU
887,951,239 km
Semi-major axis a 4.16500119 AU
623,075,310 km
Orbital period period 8.5002 years
3,104.7106 days
Date of perihelion transit Tp 2006-Oct-18 10:48:39
2,454,026.9505 JD
Next perihelion transit 2015-Apr-19 03:51
2,457,131.6610 JD
Argument of perihelion peri 31.170214383807°
Longitude of the ascending node node 9.0395608141657°
Mean anomaly M 108.59557718994°
Mean motion n 0.11595284°/day
2h1>Orbit Visualization

15 Days Ephemeris

The following table lists the ephemerides of Comet 310P/Hill computed for the past and next 7 days, with a 24 hours interval. Apparent celestial coordinates are provided.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2025 May 17 09h 49m 19s +20° 53’ 45” 24.20 Leo
2025 May 18 09h 49m 46s +20° 48’ 32” 24.22 Leo
2025 May 19 09h 50m 12s +20° 43’ 18” 24.23 Leo
2025 May 20 09h 50m 41s +20° 38’ 00” 24.25 Leo
2025 May 21 09h 51m 10s +20° 32’ 41” 24.26 Leo
2025 May 22 09h 51m 39s +20° 27’ 20” 24.28 Leo
2025 May 23 09h 52m 09s +20° 21’ 57” 24.29 Leo
2025 May 24 09h 52m 40s +20° 16’ 32” 24.31 Leo
2025 May 25 09h 53m 11s +20° 11’ 05” 24.32 Leo
2025 May 26 09h 53m 43s +20° 05’ 36” 24.34 Leo
2025 May 27 09h 54m 16s +20° 00’ 05” 24.35 Leo
2025 May 28 09h 54m 49s +19° 54’ 32” 24.37 Leo
2025 May 29 09h 55m 23s +19° 48’ 58” 24.38 Leo
2025 May 30 09h 55m 57s +19° 43’ 22” 24.40 Leo

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