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🌎 Location: Greenwich, United Kingdom [change]

Comet 110P/Hartley 3

Comet 110P/Hartley 3 is currently in the constellation of Pisces. The current Right Ascension of Comet 110P/Hartley 3 is 00h 08m 10s and the Declination is +12° 28’ 51” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 110P/Hartley 3 is 18.64 (JPL).

Summary of key facts about Comet 110P/Hartley 3 [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

00h 08m 10s
+12° 28’ 51”
Pisces
18.64
  • 110P/Hartley 3 is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the West direction at an altitude of 19° above the horizon.
  • Given its current magnitude, 110P/Hartley 3 is visible only through long exposure photography.
  • See also 110P/Hartley 3 rise and set times.
  • 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 information about Comet 110P/Hartley 3 available on TheSkyLive:

Available Resources

Comet 110P/Hartley 3 Position and Finder Charts

Below we provide Comet 110P/Hartley 3 finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Comet 110P/Hartley 3 in Pisces on January, 21 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 110P/Hartley 3 in Pisces on January, 21 2021
Field of view: 10x6 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet 110P/Hartley 3 is right now. Click on the image to see a more detailed fullscreen tracker view.

110P/Hartley 3
RA: 00h 08m 10s
Dec: +12° 28’ 51”
Deep sky finder chart for Comet 110P/Hartley 3
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 110P/Hartley 3?, a page that provides all the information needed to find Comet 110P/Hartley 3 in the sky and additional links to sky charts.

Comet 110P/Hartley 3 Distance from Earth

The distance of Comet 110P/Hartley 3 from Earth is currently 476,628,923 kilometers, equivalent to 3.186068 Astronomical Units. Light takes 26 minutes and 29.8630 seconds to travel from Comet 110P/Hartley 3 and arrive to us.

476,628,923
3.186068
26 minutes and 29.8630 seconds

The following chart shows the distance of Comet 110P/Hartley 3 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.

Distance of Comet 110P/Hartley 3 from Earth between January 2013 and December 2100

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 3 from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 110P/Hartley 3 to Earth

Between January 2013 and December 2100, the closest approach of Comet 110P/Hartley 3 to Earth happens on Wed Dec 31 2014 at a distance of 1.494125 Astronomical Units, or 223,517,926 kilometers:

Wed Dec 31 2014
223,517,926
1.494125

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

Comet 110P/Hartley 3 brightness

The current visual magnitude of Comet 110P/Hartley 3 is 18.64.

18.64
-
-

The observed magnitude and coma diameter values are derived from the Comet Observers Database by averaging the values reported in recent observations (more recent than 4 days), when available. The Estimated Magnitude comes from the JPL Horizons ephemerides service and might be inaccurate given the highly dynamic and unpredictable behavior of comets. When available, please refer to the Observed Magnitude value and consider the Estimated 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.

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 110P/Hartley 3, 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.

Predicted magnitude of Comet 110P/Hartley 3 between January 2013 and December 2100

Comet 110P/Hartley 3 rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Comet 110P/Hartley 3 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 77.6°
Max altitude: 51.0°
Azimuth: 282.5°

The rise and set times are defined as the time at which the upper limb of Comet 110P/Hartley 3 touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet 110P/Hartley 3 Orbital Elements

The following table lists the orbital elements of Comet 110P/Hartley 3 at epoch 18 April 2015 00:00 UTC (JD: 2457131.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.31492846
Orbit inclination i 11.69107152°
Perihelion distance q 2.47531782 AU
370,302,277 km
Aphelion distance Q 4.75113281 AU
710,759,353 km
Semi-major axis a 3.61322532 AU
540,530,815 km
Orbital period period 6.8700 years
2,508.6553 days
Date of perihelion transit Tp 2014-Dec-17 18:52:35
2,457,009.2865 JD
Next perihelion transit 2021-Oct-30 10:36
2,459,517.9418 JD
Argument of perihelion peri 167.74719720068°
Longitude of the ascending node node 287.71274238579°
Mean anomaly M 17.538021557143°
Mean motion n 0.14350317°/day

Visualization of Comet 110P/Hartley 3 Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 110P/Hartley 3 with respect of the Sun and the orbits of the major planets. The position of Comet 110P/Hartley 3 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 3
View Comet 110P/Hartley 3 in the 3D Solar System Simulator

Comet 110P/Hartley 3 15 Days Ephemeris

The following table lists the ephemerides of Comet 110P/Hartley 3 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 3 in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Jan 14 23h 59m 08s +11° 56’ 02” 18.66 Pegasus
2021 Jan 15 00h 00m 15s +11° 59’ 52” 18.65 Pegasus
2021 Jan 16 00h 01m 22s +12° 03’ 47” 18.65 Pegasus
2021 Jan 17 00h 02m 30s +12° 07’ 50” 18.65 Pegasus
2021 Jan 18 00h 03m 38s +12° 11’ 57” 18.65 Pegasus
2021 Jan 19 00h 04m 48s +12° 16’ 11” 18.65 Pegasus
2021 Jan 20 00h 05m 57s +12° 20’ 31” 18.64 Pegasus
2021 Jan 21 00h 07m 08s +12° 24’ 56” 18.64 Pisces
2021 Jan 22 00h 08m 18s +12° 29’ 27” 18.64 Pisces
2021 Jan 23 00h 09m 30s +12° 34’ 04” 18.64 Pisces
2021 Jan 24 00h 10m 42s +12° 38’ 45” 18.64 Pisces
2021 Jan 25 00h 11m 56s +12° 43’ 32” 18.63 Pisces
2021 Jan 26 00h 13m 09s +12° 48’ 25” 18.63 Pisces
2021 Jan 27 00h 14m 23s +12° 53’ 22” 18.63 Pisces