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🌎  Observing from: Greenwich, United Kingdom [change]

Comet 78P/Gehrels 2

Comet 78P/Gehrels 2 is currently in the constellation of Libra. The current Right Ascension of Comet 78P/Gehrels 2 is 15h 44m 40s and the Declination is -17° 56’ 02” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 78P/Gehrels 2 is 22.49 (JPL).

Summary of key facts about Comet 78P/Gehrels 2 [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]:

15h 44m 40s
-17° 56’ 02”
  • 78P/Gehrels 2 is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South direction at an altitude of 20° above the horizon.
  • Given its current magnitude, 78P/Gehrels 2 is visible only through long exposure photography.
  • See also 78P/Gehrels 2 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 78P/Gehrels 2 available on TheSkyLive:

Available Resources

Comet 78P/Gehrels 2 Position and Finder Charts

Below we provide Comet 78P/Gehrels 2 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 78P/Gehrels 2 in Libra on February, 05 2023
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 78P/Gehrels 2 in Libra on February, 05 2023
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 78P/Gehrels 2 is right now. Click on the image to see a more detailed fullscreen tracker view.

78P/Gehrels 2
RA: 15h 44m 40s
Dec: -17° 56’ 02”
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 from Earth

The distance of Comet 78P/Gehrels 2 from Earth is currently 833,492,188 kilometers, equivalent to 5.571551 Astronomical Units. Light takes 46 minutes and 20.2307 seconds to travel from Comet 78P/Gehrels 2 and arrive to us.

46 minutes and 20.2307 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 1.558245 Astronomical Units, or 233,110,168 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 22.49.


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 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: 107.9°
Max altitude: 20.6°
Azimuth: 252.1°

The rise and set times are defined as the time at which the upper limb of Comet 78P/Gehrels 2 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 78P/Gehrels 2 Orbital Elements

The following table lists the orbital elements of Comet 78P/Gehrels 2 at epoch 25 November 2014 00:00 UTC (JD: 2456987.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.46163737
Orbit inclination i 6.25269651°
Perihelion distance q 2.01153655 AU
300,921,585 km
Aphelion distance Q 5.46125761 AU
816,992,511 km
Semi-major axis a 3.73639708 AU
558,957,048 km
Orbital period period 7.2225 years
2,638.0193 days
Date of perihelion transit Tp 2012-Jan-12 02:31:06
2,455,938.6049 JD
Next perihelion transit 2019-Apr-03 02:58
2,458,576.6242 JD
Argument of perihelion peri 192.75585994643°
Longitude of the ascending node node 210.56267575334°
Mean anomaly M 143.13853885266°
Mean motion n 0.13646602°/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
2023 Jan 29 15h 41m 30s -17° 50’ 30” 22.54 Libra
2023 Jan 30 15h 41m 58s -17° 51’ 23” 22.53 Libra
2023 Jan 31 15h 42m 25s -17° 52’ 14” 22.52 Libra
2023 Feb 01 15h 42m 52s -17° 53’ 02” 22.52 Libra
2023 Feb 02 15h 43m 18s -17° 53’ 48” 22.51 Libra
2023 Feb 03 15h 43m 44s -17° 54’ 30” 22.50 Libra
2023 Feb 04 15h 44m 08s -17° 55’ 12” 22.50 Libra
2023 Feb 05 15h 44m 32s -17° 55’ 50” 22.49 Libra
2023 Feb 06 15h 44m 57s -17° 56’ 26” 22.48 Libra
2023 Feb 07 15h 45m 20s -17° 56’ 59” 22.48 Libra
2023 Feb 08 15h 45m 42s -17° 57’ 30” 22.47 Libra
2023 Feb 09 15h 46m 04s -17° 58’ 00” 22.46 Libra
2023 Feb 10 15h 46m 26s -17° 58’ 26” 22.46 Libra
2023 Feb 11 15h 46m 45s -17° 58’ 49” 22.45 Libra