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🌎  Greenwich, United Kingdom [change]

Comet 12P/Pons-Brooks

Comet 12P/Pons-Brooks is currently in the constellation of Hercules. The current Right Ascension of Comet 12P/Pons-Brooks is 17h 41m 19s and the Declination is +28° 28’ 20” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 12P/Pons-Brooks is 21.29 (JPL).

Summary of key facts about Comet 12P/Pons-Brooks [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]:

17h 41m 19s
+28° 28’ 20”
  • 12P/Pons-Brooks is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South-West direction at an altitude of 61° above the horizon.
  • Given its current magnitude, 12P/Pons-Brooks is visible only through long exposure photography.
  • See also 12P/Pons-Brooks 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 12P/Pons-Brooks available on TheSkyLive:

Available Resources

Comet 12P/Pons-Brooks Position and Finder Charts

Below we provide Comet 12P/Pons-Brooks 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 12P/Pons-Brooks in Hercules on September, 30 2022
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 12P/Pons-Brooks in Hercules on September, 30 2022
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 12P/Pons-Brooks is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 17h 41m 19s
Dec: +28° 28’ 20”
Deep sky finder chart for Comet 12P/Pons-Brooks
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 12P/Pons-Brooks?, a page that provides all the information needed to find Comet 12P/Pons-Brooks in the sky and additional links to sky charts.

Comet 12P/Pons-Brooks Distance from Earth

The distance of Comet 12P/Pons-Brooks from Earth is currently 983,882,131 kilometers, equivalent to 6.576846 Astronomical Units. Light takes 54 minutes and 41.8775 seconds to travel from Comet 12P/Pons-Brooks and arrive to us.

54 minutes and 41.8775 seconds

The following chart shows the distance of Comet 12P/Pons-Brooks 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 12P/Pons-Brooks 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 12P/Pons-Brooks from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 12P/Pons-Brooks to Earth

Between January 2013 and December 2100, the closest approach of Comet 12P/Pons-Brooks to Earth happens on Wed Aug 31 2095 at a distance of 1.498779 Astronomical Units, or 224,214,164 kilometers:

Wed Aug 31 2095

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

Comet 12P/Pons-Brooks brightness

The current visual magnitude of Comet 12P/Pons-Brooks is 21.29.


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 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 12P/Pons-Brooks, 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 12P/Pons-Brooks between January 2013 and December 2100

Comet 12P/Pons-Brooks 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 12P/Pons-Brooks rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 61.5°
Max altitude: 67.0°
Azimuth: 298.5°

The rise and set times are defined as the time at which the upper limb of Comet 12P/Pons-Brooks 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 12P/Pons-Brooks Orbital Elements

The following table lists the orbital elements of Comet 12P/Pons-Brooks at epoch 08 June 2017 00:00 UTC (JD: 2457913.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.95432077
Orbit inclination i 74.13842414°
Perihelion distance q 0.77496757 AU
115,933,498 km
Aphelion distance Q 33.15588480 AU
4,960,049,777 km
Semi-major axis a 16.96542619 AU
2,537,991,638 km
Orbital period period 69.8804 years
25,523.8150 days
Date of perihelion transit Tp 2024-Apr-23 08:41:25
2,460,423.8621 JD
Argument of perihelion peri 199.16725367369°
Longitude of the ascending node node 255.75801903693°
Mean anomaly M 324.59266148156°
Mean motion n 0.01410447°/day

Visualization of Comet 12P/Pons-Brooks Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 12P/Pons-Brooks with respect of the Sun and the orbits of the major planets. The position of Comet 12P/Pons-Brooks 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 12P/Pons-Brooks
View Comet 12P/Pons-Brooks in the 3D Solar System Simulator

Comet 12P/Pons-Brooks 15 Days Ephemeris

The following table lists the ephemerides of Comet 12P/Pons-Brooks computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 12P/Pons-Brooks in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2022 Sep 23 17h 40m 33s +29° 10’ 55” 21.34 Hercules
2022 Sep 24 17h 40m 37s +29° 05’ 23” 21.34 Hercules
2022 Sep 25 17h 40m 41s +28° 59’ 53” 21.33 Hercules
2022 Sep 26 17h 40m 46s +28° 54’ 23” 21.32 Hercules
2022 Sep 27 17h 40m 51s +28° 48’ 52” 21.32 Hercules
2022 Sep 28 17h 40m 58s +28° 43’ 24” 21.31 Hercules
2022 Sep 29 17h 41m 04s +28° 37’ 58” 21.30 Hercules
2022 Sep 30 17h 41m 12s +28° 32’ 31” 21.29 Hercules
2022 Oct 01 17h 41m 21s +28° 27’ 07” 21.29 Hercules
2022 Oct 02 17h 41m 30s +28° 21’ 45” 21.28 Hercules
2022 Oct 03 17h 41m 39s +28° 16’ 23” 21.27 Hercules
2022 Oct 04 17h 41m 49s +28° 11’ 03” 21.26 Hercules
2022 Oct 05 17h 42m 01s +28° 05’ 45” 21.26 Hercules
2022 Oct 06 17h 42m 11s +28° 00’ 29” 21.25 Hercules