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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:38  ☀️ Transit: 13:03  🌅 Sunset: 19:28

Comet 12P/Pons-Brooks

Comet 12P/Pons-Brooks is currently in the constellation of Cygnus. The current Right Ascension of Comet 12P/Pons-Brooks is 19h 30m 11s and the Declination is +35° 34’ 30” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 12P/Pons-Brooks is 18.95 (JPL) while the latest observed magnitude is 18.5 (COBS).

19h 30m 11s
+35° 34’ 30”

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

Azimuth: 54.4°
Max altitude: 74.0°
Azimuth: 305.5°
  • 12P/Pons-Brooks is above the horizon from Greenwich, United Kingdom [change].
  • Right now it is placed in the North-North-East direction at an altitude of 4° above the horizon.
  • Given its current magnitude, 12P/Pons-Brooks is visible only through long exposure photography.
  • Go to interactive sky chart

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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 Cygnus on March, 31 2023
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 12P/Pons-Brooks in Cygnus on March, 31 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 12P/Pons-Brooks is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 19h 30m 11s
Dec: +35° 34’ 30”
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 760,011,063 kilometers, equivalent to 5.080360 Astronomical Units. Light takes 42 minutes and 15.1240 seconds to travel from Comet 12P/Pons-Brooks and arrive to us.

42 minutes and 15.1240 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.

Chart of the distance of Comet 12P/Pons-Brooks from Earth in Astronomical Units (au)

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 1 January 2013 and 30 December 2100, the closest approach of Comet 12P/Pons-Brooks to Earth happens on Wed Aug 31 2095 at a distance of 1.498794 Astronomical Units, or 224,216,431 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 18.95.


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.

Chart of the magnitude of Comet 12P/Pons-Brooks as a function of time

Comet 12P/Pons-Brooks Orbital Elements

The following table lists the orbital elements of Comet 12P/Pons-Brooks at epoch 20 February 2018 00:00 UTC (JD: 2458170.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.95427749
Orbit inclination i 74.08709807°
Perihelion distance q 0.77651883 AU
116,165,563 km
Aphelion distance Q 33.19007210 AU
4,965,164,125 km
Semi-major axis a 16.98329546 AU
2,540,664,844 km
Orbital period period 69.9908 years
25,564.1510 days
Date of perihelion transit Tp 2024-Apr-23 01:40:24
2,460,423.5697 JD
Argument of perihelion peri 199.15075820536°
Longitude of the ascending node node 255.71768964749°
Mean anomaly M 328.27177624568°
Mean motion n 0.01408222°/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
2023 Mar 24 19h 26m 36s +34° 01’ 23” 19.11 Cygnus
2023 Mar 25 19h 27m 06s +34° 12’ 50” 19.09 Cygnus
2023 Mar 26 19h 27m 34s +34° 24’ 23” 19.07 Cygnus
2023 Mar 27 19h 28m 03s +34° 36’ 02” 19.05 Cygnus
2023 Mar 28 19h 28m 30s +34° 47’ 48” 19.03 Cygnus
2023 Mar 29 19h 28m 57s +34° 59’ 38” 19.01 Cygnus
2023 Mar 30 19h 29m 22s +35° 11’ 35” 18.99 Cygnus
2023 Mar 31 19h 29m 48s +35° 23’ 36” 18.97 Cygnus
2023 Apr 01 19h 30m 14s +35° 35’ 44” 18.95 Cygnus
2023 Apr 02 19h 30m 38s +35° 47’ 57” 18.93 Cygnus
2023 Apr 03 19h 31m 01s +36° 00’ 15” 18.91 Cygnus
2023 Apr 04 19h 31m 23s +36° 12’ 38” 18.89 Cygnus
2023 Apr 05 19h 31m 46s +36° 25’ 06” 18.88 Cygnus
2023 Apr 06 19h 32m 08s +36° 37’ 41” 18.86 Cygnus