Your guide to the Solar System
🌎 Location: Greenwich, United Kingdom [change]
Comets » 

Comet 78P/Gehrels 2

Available Resources

Comet 78P/Gehrels 2 Position

Comet 78P/Gehrels 2 is currently in the constellation of Gemini. The current Right Ascension is 07h 35m 19s and the Declination is +17° 11’ 16”.

07h 35m 19s
+17° 11’ 16”

Simplified sky chart showing where Comet 78P/Gehrels 2 is right now in the sky with respect to the brightest stars and constellations (see fuillscreen Online Planetarium)

Map showing Comet 78P/Gehrels 2 in Gemini on August, 23 2019
Field of view: 60x30 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]

Hihgher precision deep sky finder chart showing where Comet 78P/Gehrels 2 is right now (view fullscreen)

78P/Gehrels 2
RA: 07h 35m 19s
Dec: +17° 11’ 16”
Deep sky finder chart for Comet 78P/Gehrels 2
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 78P/Gehrels 2?, a page that provides all the information needed to find Comet 78P/Gehrels 2 in the sky and additional links to sky charts.

Comet 78P/Gehrels 2 Distance

The distance of Comet 78P/Gehrels 2 from Earth is currently 453,780,374 kilometers, equivalent to 3.033334 Astronomical Units. Light takes 25 minutes and 13.6484 seconds to travel from Comet 78P/Gehrels 2 and arrive to us.

25 minutes and 13.6484 seconds

The following chart shows the distance of Comet 78P/Gehrels 2 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 78P/Gehrels 2 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 78P/Gehrels 2 from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 78P/Gehrels 2 to Earth

Between January 2013 and December 2100 the closest approach of Comet 78P/Gehrels 2 to Earth happens on Thu Dec 31 2026 at a distance of 1.56053057 Astronomical Units, or 233,452,051 kilometers:

Thu Dec 31 2026

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

Comet 78P/Gehrels 2 brightness

The current visual magnitude of Comet 78P/Gehrels 2 is 16.29.


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 behvior 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 78P/Gehrels 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 78P/Gehrels 2 between January 2013 and December 2100

Comet 78P/Gehrels 2 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 78P/Gehrels 2 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 72.7°
Max altitude: 55.8°
Azimuth: 287.2°
Comet 78P/Gehrels 2 is below the horizon from Greenwich, United Kingdom

The rise and set times are defined as the time at which the upper limb of Comet 78P/Gehrels 2 touches the horizon, consideting the effect of the atmospheric refraction. As the atmoshpere conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet 78P/Gehrels 2 Orbital Elements

The following table lists the orbital elements of Comet 78P/Gehrels 2 at epoch 19 October 2013 00:00 UTC (JD: 2456585.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.46213279
Orbit inclination i 6.25480342°
Perihelion distance q 2.00918934 AU
300,570,447 km
Aphelion distance Q 5.46175997 AU
817,067,663 km
Semi-major axis a 3.73547465 AU
558,819,055 km
Orbital period period 7.2200 years
2,637.0424 days
Date of perihelion transit Tp 2012-Jan-12 14:49:57
2,455,939.1180 JD
Next perihelion transit 2019-Apr-02 15:51
2,458,576.1605 JD
Argument of perihelion peri 192.74668876326°
Longitude of the ascending node node 210.55732916182°
Mean anomaly M 88.241853662213°
Mean motion n 0.13651657°/day

Visualization of Comet 78P/Gehrels 2 Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 78P/Gehrels 2 with respect of the Sun and the orbits of the major planets. The position of Comet 78P/Gehrels 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 78P/Gehrels 2
View Comet 78P/Gehrels 2 in the 3D Solar System Simulator

Comet 78P/Gehrels 2 15 Days Ephemeris

The following table lists the ephemerides of Comet 78P/Gehrels 2 computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 78P/Gehrels 2 in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Aug 16 07h 19m 46s +17° 55’ 28” 16.22 Gemini
2019 Aug 17 07h 21m 46s +17° 50’ 12” 16.23 Gemini
2019 Aug 18 07h 23m 44s +17° 44’ 52” 16.24 Gemini
2019 Aug 19 07h 25m 41s +17° 39’ 25” 16.24 Gemini
2019 Aug 20 07h 27m 38s +17° 33’ 56” 16.25 Gemini
2019 Aug 21 07h 29m 35s +17° 28’ 21” 16.26 Gemini
2019 Aug 22 07h 31m 32s +17° 22’ 41” 16.27 Gemini
2019 Aug 23 07h 33m 27s +17° 16’ 56” 16.28 Gemini
2019 Aug 24 07h 35m 21s +17° 11’ 08” 16.29 Gemini
2019 Aug 25 07h 37m 15s +17° 05’ 17” 16.29 Gemini
2019 Aug 26 07h 39m 10s +16° 59’ 21” 16.30 Gemini
2019 Aug 27 07h 41m 03s +16° 53’ 21” 16.31 Gemini
2019 Aug 28 07h 42m 55s +16° 47’ 16” 16.32 Gemini
2019 Aug 29 07h 44m 47s +16° 41’ 08” 16.32 Gemini