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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:56 
Transit: 13:05 
Sunset: 21:13
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Comet 310P/Hill

Below the horizon.  Rise: 8:51 | Tran: 16:10 | Set: 23:29
Alt: -20.68°   Az: 20.94°   Direction: North-North-East

Comet 310P/Hill is in the constellation of Leo, at a distance of 753,735,924.0 kilometers from Earth. The current Right Ascension is 10h 25m 37s and the Declination is +15° 32’ 31” (apparent coordinates). The estimated magnitude of comet 310P/Hill, computed using JPL Horizons's data, is 24.92.

Finder Charts

The sky charts below show, at different resolutions, the position of comet 310P/Hill in the sky. Click on each chart to access the interactive star map tool.

Star map showing the position of comet 310P/Hill in the constellation of Leo on F, d Y. Field of view: 50x30 degrees. View interactive star map.
Star map showing the position of comet 310P/Hill in the constellation of Leo on F, d Y. Field of view: 15x9 degrees. View in interactive star map.

The following map uses photographic imagery from the Digitized Sky Survey (DSS) to realistically visualize the precise position of comet 310P/Hill against the stars in the background. The horizontal size of the map measures 60 arcminutes. Click on the image to access a more detailed full-screen view.

310P/Hill
RA: 10h 24m 15s
Dec: +15° 40’ 20”
Simplified high-resolution deep sky chart showing the current position of comet 310P/Hill. Field of view: 60 x 40 arcminutes. Go to the dedicated page

Equatorial Coordinates

Apparent

10h 25m 37s
+15° 32’ 31”
13h 21m 13s
23h 46m 51s

J2000

10h 24m 15s
+15° 40’ 20”

Additional Information

Leo
n/a
n/a
n/a
n/a
24.92

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

The following table lists today's rise, transit and set times of comet 310P/Hill from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 74.5°
Max altitude: 54.0°
Azimuth: 285.5°

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 753,735,924.0 kilometers, equivalent to 5.0384134512 Astronomical Units. Light takes 41m 54.192s to travel from comet 310P/Hill and arrive to us.

753,735,924.0
5.0384134512
41m 54.192s

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

Chart of the distance of comet 310P/Hill from Earth in Astronomical Units (au)
Note: The values in this chart may not be entirely accurate around the time of closest approach for objects passing very close to Earth at high speed (e.g., Near-Earth Objects).

The value of the distance of 310P/Hill from Earth is also available as a real time updated value in the live position tracker.

Closest Approach to Earth

In the period between January 1, 2000 and December 31, 2099, the closest approach of comet 310P/Hill to Earth will happen on Thursday 22 October 2065 at a distance of 1.280591 Astronomical Units, or 191,573,654 kilometers:

Thursday 22 October 2065
191,573,654
1.280591

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

Light Curve

The following chart shows the light curve of comet 310P/Hill, i.e., its apparent magnitude as a function of time. The curve is calculated using the latest ephemerides provided by JPL Horizons. The magnitude data is sampled with the interval of 2 days. Because of this sampling, inaccuracies may occur for objects that have large variations of brightness over a few days. For comets, large discrepancies can arise between the calculated brightness and the observations due to their highly dynamic, and not always precisely predictable, behavior.

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 May, 11 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 October 18, 2006
2,454,026.9505 JD
Next perihelion transit April 19, 2015
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

Orbit Visualization

The following chart is a 3D animated visualization of the orbit of comet 310P/Hill relative to the other major objects in the Solar System. You can access more advanced features using our 3D Solar System Viewer.

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
Jul 03 2025 10h 19m 46s +16° 18’ 36” 24.84 Leo
Jul 04 2025 10h 20m 34s +16° 12’ 14” 24.85 Leo
Jul 05 2025 10h 21m 23s +16° 05’ 52” 24.86 Leo
Jul 06 2025 10h 22m 11s +15° 59’ 28” 24.88 Leo
Jul 07 2025 10h 23m 00s +15° 53’ 03” 24.89 Leo
Jul 08 2025 10h 23m 49s +15° 46’ 38” 24.90 Leo
Jul 09 2025 10h 24m 38s +15° 40’ 12” 24.91 Leo
Jul 10 2025 10h 25m 28s +15° 33’ 45” 24.92 Leo
Jul 11 2025 10h 26m 18s +15° 27’ 17” 24.93 Leo
Jul 12 2025 10h 27m 08s +15° 20’ 49” 24.94 Leo
Jul 13 2025 10h 27m 58s +15° 14’ 20” 24.95 Leo
Jul 14 2025 10h 28m 48s +15° 07’ 50” 24.96 Leo
Jul 15 2025 10h 29m 38s +15° 01’ 19” 24.97 Leo
Jul 16 2025 10h 30m 29s +14° 54’ 49” 24.98 Leo

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