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Comet 103P/Hartley 2

Available Resources

Comet 103P/Hartley 2 Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet 103P/Hartley 2 is now with respect to the brightest stars and constellations. More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Comet 103P/Hartley 2 in Aries on February, 25 2017
High Precision Live Sky Chart
03h 23m 54s
+21° 03’ 15”
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Comet 103P/Hartley 2 Rise and Set Times

Today's Comet 103P/Hartley 2 rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 68.9°
Max altitude: 59.6°
Azimuth: 291.1°

Comet 103P/Hartley 2 Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 103P/Hartley 2 with respect of the Sun and the orbits of the major planets. The position of Comet 103P/Hartley 2 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 103P/Hartley 2
View Comet 103P/Hartley 2 in the 3D Solar System Simulator

Comet 103P/Hartley 2 Ephemeris

The following table lists the ephemerides of Comet 103P/Hartley 2 computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 103P/Hartley 2 in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 Feb 18 21.65 03h 22m 00s +20° 57’ 20” Aries
2017 Feb 19 21.65 03h 22m 14s +20° 58’ 05” Aries
2017 Feb 20 21.65 03h 22m 30s +20° 58’ 51” Aries
2017 Feb 21 21.66 03h 22m 45s +20° 59’ 40” Aries
2017 Feb 22 21.66 03h 23m 02s +21° 00’ 32” Aries
2017 Feb 23 21.67 03h 23m 18s +21° 01’ 23” Aries
2017 Feb 24 21.67 03h 23m 36s +21° 02’ 18” Aries
2017 Feb 25 21.67 03h 23m 54s +21° 03’ 15” Aries
2017 Feb 26 21.68 03h 24m 12s +21° 04’ 13” Aries
2017 Feb 27 21.68 03h 24m 32s +21° 05’ 12” Aries
2017 Feb 28 21.68 03h 24m 51s +21° 06’ 15” Aries
2017 Mar 01 21.69 03h 25m 11s +21° 07’ 18” Aries
2017 Mar 02 21.69 03h 25m 32s +21° 08’ 24” Aries
2017 Mar 03 21.69 03h 25m 53s +21° 09’ 30” Aries

Distance of Comet 103P/Hartley 2 from Earth

The following chart shows the distance of Comet 103P/Hartley 2 from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval. The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 103P/Hartley 2 is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet 103P/Hartley 2 from Earth between January 2013 and January 2030

Light Curve of Comet 103P/Hartley 2

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 103P/Hartley 2, 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 103P/Hartley 2 between January 2013 and January 2030

Comet 103P/Hartley 2 Orbital Elements

The following table lists the orbital elements of Comet 103P/Hartley 2 at epoch 19 November 2014 00:00 UTC (JD: 2456981.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.69378047
Orbit inclination i 13.60427243°
Perihelion distance q 1.06419515 AU
159,201,329 km
Aphelion distance Q 5.88634233 AU
880,584,281 km
Semi-major axis a 3.47526874 AU
519,892,805 km
Orbital period period 6.4800 years
2,366.3611 days
Date of perihelion transit Tp 2017-Apr-20 07:45:09
2,457,863.8230 JD
Argument of perihelion peri 181.32228577283°
Longitude of the ascending node node 219.7487450736°
Mean anomaly M 225.77015224411°
Mean motion n 0.15213232°/day
Closest approach to Earth* 2022-Apr-14
Distance of closest approach* 3.70342661 AU
554,024,737 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2030-Jan-01, with a sampling interval of 1 day.