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public LocationGreenwich, UK
Sunrise: 4:43 
Transit: 13:01 
Sunset: 21:18
wb_twilight   (Astronomical Twilight)   What's Visible Now?
Comets » 

Comet 110P/Hartley

Above the horizon.  Rise: 20:12 | Tran: 23:07 | Set: 2:05
Altitude: 8.5°   Azimuth: 185.4°   Direction: South

Comet 110P/Hartley is currently in the constellation of Scorpius, at a distance of 548,785,440 kilometers from Earth. The current Right Ascension of Comet 110P/Hartley is 16h 21m 26s and the Declination is -29° 49’ 48” (topocentric coordinates computed for the selected location: Greenwich, UK). The current estimated magnitude of Comet 110P/Hartley is 23.28 (JPL).

Finder chart of 110P/Hartley in Scorpius on June,24 2024
Map showing Comet 110P/Hartley in Scorpius on June, 24 2024. Field of view: 50x30 degrees
View interactive star map

16h 21m 26s
-29° 49’ 48”

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.

Today's rise, transit and set times of Comet 110P/Hartley from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 119.8°
Max altitude: 8.7°
Azimuth: 240.1°
  • 110P/Hartley is above the horizon from Greenwich, UK.
  • Right now it is placed in the South direction at an altitude of 9° above the horizon.
  • Given its current magnitude, 110P/Hartley 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.

Additional Resources

Comet 110P/Hartley Position and Finder Charts

Finder chart of 110P/Hartley
Map showing Comet 110P/Hartley in Scorpius on June, 24 2024
Field of view: 10x6 degrees
View fullscreen

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet 110P/Hartley is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 16h 21m 26s
Dec: -29° 49’ 48”
Deep sky finder chart for Comet 110P/Hartley
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 110P/Hartley?, a page that provides all the information needed to find Comet 110P/Hartley in the sky and additional links to sky charts.

Comet 110P/Hartley Distance from Earth

The distance of Comet 110P/Hartley from Earth is currently 548,785,440 kilometers, equivalent to 3.668404 Astronomical Units. Light takes 30 minutes and 30.5512 seconds to travel from Comet 110P/Hartley and arrive to us.

30 minutes and 30.5512 seconds

The following chart shows the distance of Comet 110P/Hartley 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 110P/Hartley 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 110P/Hartley from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach of Comet 110P/Hartley to Earth

Between 1 January 2013 and 30 December 2100, the closest approach of Comet 110P/Hartley to Earth happens on Wed Dec 31 2014 at a distance of 1.494125 Astronomical Units, or 223,517,893 kilometers:

Wed Dec 31 2014

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

Comet 110P/Hartley Brightness and Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 110P/Hartley, 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 110P/Hartley as a function of time

Comet 110P/Hartley Orbital Elements

The following table lists the orbital elements of Comet 110P/Hartley at epoch 28 April 2018 00:00 UTC (JD: 2458237.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.31626529
Orbit inclination i 11.69814307°
Perihelion distance q 2.46453371 AU
368,688,996 km
Aphelion distance Q 4.74450123 AU
709,767,283 km
Semi-major axis a 3.60451747 AU
539,228,140 km
Orbital period period 6.8435 years
2,499.5920 days
Date of perihelion transit Tp 2014-Dec-16 16:11:12
2,457,008.1744 JD
Next perihelion transit 2021-Oct-20 06:23
2,459,507.7665 JD
Argument of perihelion peri 167.39700880629°
Longitude of the ascending node node 287.52981463754°
Mean anomaly M 177.05177306679°
Mean motion n 0.14402350°/day

Visualization of Comet 110P/Hartley Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 110P/Hartley with respect of the Sun and the orbits of the major planets. The position of Comet 110P/Hartley and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Orbit Diagram of Comet 110P/Hartley
View Comet 110P/Hartley in the 3D Solar System Simulator

Comet 110P/Hartley 15 Days Ephemeris

The following table lists the ephemerides of Comet 110P/Hartley computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 110P/Hartley in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2024 Jun 17 16h 26m 26s -30° 15’ 20” 23.23 Scorpius
2024 Jun 18 16h 25m 46s -30° 12’ 11” 23.24 Scorpius
2024 Jun 19 16h 25m 06s -30° 09’ 02” 23.24 Scorpius
2024 Jun 20 16h 24m 29s -30° 05’ 49” 23.25 Scorpius
2024 Jun 21 16h 23m 49s -30° 02’ 36” 23.25 Scorpius
2024 Jun 22 16h 23m 12s -29° 59’ 22” 23.26 Scorpius
2024 Jun 23 16h 22m 36s -29° 56’ 07” 23.27 Scorpius
2024 Jun 24 16h 21m 59s -29° 52’ 50” 23.27 Scorpius
2024 Jun 25 16h 21m 24s -29° 49’ 33” 23.28 Scorpius
2024 Jun 26 16h 20m 48s -29° 46’ 15” 23.29 Scorpius
2024 Jun 27 16h 20m 14s -29° 42’ 57” 23.29 Scorpius
2024 Jun 28 16h 19m 41s -29° 39’ 38” 23.30 Scorpius
2024 Jun 29 16h 19m 09s -29° 36’ 20” 23.31 Scorpius
2024 Jun 30 16h 18m 37s -29° 33’ 01” 23.31 Scorpius