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🌎 Location: Greenwich, United Kingdom [change]

Comet 64P/Swift-Gehrels

Comet 64P/Swift-Gehrels is currently in the constellation of Virgo. The current Right Ascension of Comet 64P/Swift-Gehrels is 12h 21m 48s and the Declination is -09° 59’ 11” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 64P/Swift-Gehrels is 24.16 (JPL).

Summary of key facts about Comet 64P/Swift-Gehrels [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]:

12h 21m 48s
-09° 59’ 11”
  • 64P/Swift-Gehrels is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South-South-East direction at an altitude of 27° above the horizon.
  • Given its current magnitude, 64P/Swift-Gehrels is visible only through long exposure photography.
  • See also 64P/Swift-Gehrels 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 64P/Swift-Gehrels available on TheSkyLive:

Available Resources

Comet 64P/Swift-Gehrels Position and Finder Charts

Below we provide Comet 64P/Swift-Gehrels 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 64P/Swift-Gehrels in Virgo on October, 27 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 64P/Swift-Gehrels in Virgo on October, 27 2020
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 64P/Swift-Gehrels is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 12h 21m 48s
Dec: -09° 59’ 11”
Deep sky finder chart for Comet 64P/Swift-Gehrels
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 64P/Swift-Gehrels?, a page that provides all the information needed to find Comet 64P/Swift-Gehrels in the sky and additional links to sky charts.

Comet 64P/Swift-Gehrels Distance from Earth

The distance of Comet 64P/Swift-Gehrels from Earth is currently 971,228,071 kilometers, equivalent to 6.492259 Astronomical Units. Light takes 53 minutes and 59.6681 seconds to travel from Comet 64P/Swift-Gehrels and arrive to us.

53 minutes and 59.6681 seconds

The following chart shows the distance of Comet 64P/Swift-Gehrels 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 64P/Swift-Gehrels 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 64P/Swift-Gehrels from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 64P/Swift-Gehrels to Earth

Between January 2013 and December 2100, the closest approach of Comet 64P/Swift-Gehrels to Earth happens on Sun Oct 28 2018 at a distance of 0.444805 Astronomical Units, or 66,541,866 kilometers:

Sun Oct 28 2018

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

Comet 64P/Swift-Gehrels brightness

The current visual magnitude of Comet 64P/Swift-Gehrels is 24.16.


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 64P/Swift-Gehrels, 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 64P/Swift-Gehrels between January 2013 and December 2100

Comet 64P/Swift-Gehrels 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 64P/Swift-Gehrels rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 100.0°
Max altitude: 28.5°
Azimuth: 260.0°

The rise and set times are defined as the time at which the upper limb of Comet 64P/Swift-Gehrels 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 64P/Swift-Gehrels Orbital Elements

The following table lists the orbital elements of Comet 64P/Swift-Gehrels at epoch 07 December 2017 00:00 UTC (JD: 2458095.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.68731946
Orbit inclination i 8.94839009°
Perihelion distance q 1.39335309 AU
208,442,656 km
Aphelion distance Q 7.51895766 AU
1,124,820,058 km
Semi-major axis a 4.45615538 AU
666,631,357 km
Orbital period period 9.4100 years
3,435.8873 days
Date of perihelion transit Tp 2018-Nov-03 21:53:28
2,458,426.4121 JD
Next perihelion transit 2028-Mar-31 19:11
2,461,862.2995 JD
Argument of perihelion peri 97.14410525138°
Longitude of the ascending node node 300.00098545431°
Mean anomaly M 325.32820872749°
Mean motion n 0.10477643°/day

Visualization of Comet 64P/Swift-Gehrels Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 64P/Swift-Gehrels with respect of the Sun and the orbits of the major planets. The position of Comet 64P/Swift-Gehrels 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 64P/Swift-Gehrels
View Comet 64P/Swift-Gehrels in the 3D Solar System Simulator

Comet 64P/Swift-Gehrels 15 Days Ephemeris

The following table lists the ephemerides of Comet 64P/Swift-Gehrels computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 64P/Swift-Gehrels in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Oct 20 12h 17m 00s -09° 23’ 17” 24.14 Virgo
2020 Oct 21 12h 17m 40s -09° 28’ 12” 24.15 Virgo
2020 Oct 22 12h 18m 20s -09° 33’ 05” 24.15 Virgo
2020 Oct 23 12h 18m 59s -09° 37’ 57” 24.15 Virgo
2020 Oct 24 12h 19m 37s -09° 42’ 48” 24.15 Virgo
2020 Oct 25 12h 20m 17s -09° 47’ 39” 24.15 Virgo
2020 Oct 26 12h 20m 56s -09° 52’ 31” 24.16 Virgo
2020 Oct 27 12h 21m 33s -09° 57’ 20” 24.16 Virgo
2020 Oct 28 12h 22m 11s -10° 02’ 09” 24.16 Virgo
2020 Oct 29 12h 22m 50s -10° 06’ 59” 24.16 Virgo
2020 Oct 30 12h 23m 27s -10° 11’ 47” 24.16 Virgo
2020 Oct 31 12h 24m 05s -10° 16’ 33” 24.16 Virgo
2020 Nov 01 12h 24m 42s -10° 21’ 20” 24.16 Virgo
2020 Nov 02 12h 25m 18s -10° 26’ 07” 24.17 Virgo