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Comet 12P/Pons-Brooks

Available Resources

Comet 12P/Pons-Brooks Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet 12P/Pons-Brooks is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Comet 12P/Pons-Brooks in Ophiucus on October, 17 2018
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
17h 40m 10s
+12° 46’ 20”
-
28.51
-

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.

Comet 12P/Pons-Brooks Rise and Set Times

Today's Comet 12P/Pons-Brooks rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 77.2°
Max altitude: 51.3°
Azimuth: 282.8°

Comet 12P/Pons-Brooks Orbit Diagram

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 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
2018 Oct 10 17h 39m 18s +13° 00’ 00” 28.52 Ophiucus
2018 Oct 11 17h 39m 24s +12° 58’ 06” 28.52 Ophiucus
2018 Oct 12 17h 39m 29s +12° 56’ 13” 28.52 Ophiucus
2018 Oct 13 17h 39m 37s +12° 54’ 23” 28.52 Ophiucus
2018 Oct 14 17h 39m 43s +12° 52’ 32” 28.52 Ophiucus
2018 Oct 15 17h 39m 51s +12° 50’ 43” 28.52 Ophiucus
2018 Oct 16 17h 39m 59s +12° 48’ 55” 28.51 Ophiucus
2018 Oct 17 17h 40m 06s +12° 47’ 08” 28.51 Ophiucus
2018 Oct 18 17h 40m 14s +12° 45’ 21” 28.51 Ophiucus
2018 Oct 19 17h 40m 23s +12° 43’ 36” 28.51 Ophiucus
2018 Oct 20 17h 40m 32s +12° 41’ 53” 28.51 Ophiucus
2018 Oct 21 17h 40m 40s +12° 40’ 10” 28.51 Ophiucus
2018 Oct 22 17h 40m 49s +12° 38’ 29” 28.51 Ophiucus
2018 Oct 23 17h 40m 58s +12° 36’ 48” 28.51 Ophiucus

Distance of Comet 12P/Pons-Brooks from Earth

The following chart shows the distance of Comet 12P/Pons-Brooks from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 12P/Pons-Brooks is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet 12P/Pons-Brooks from Earth between January 2013 and December 2075

Light Curve of Comet 12P/Pons-Brooks

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 2075

Comet 12P/Pons-Brooks Orbital Elements

The following table lists the orbital elements of Comet 12P/Pons-Brooks at epoch 01 January 1970 00:00 UTC (JD: 2435000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.95481239
Orbit inclination i 74.17689423°
Perihelion distance q 0.77366709 AU
115,738,949 km
Aphelion distance Q 33.46877940 AU
5,006,858,143 km
Semi-major axis a 17.12122324 AU
2,561,298,546 km
Orbital period period 70.8500 years
25,876.2067 days
Date of perihelion transit Tp 1954-May-22 21:08:25
2,434,885.3809 JD
Next perihelion transit 2025-Mar-27 02:06
2,460,761.5876 JD
Argument of perihelion peri 199.0284685654°
Longitude of the ascending node node 255.8911443583°
Mean anomaly M 1.601583044411°
Mean motion n 0.01391239°/day
Closest approach to Earth* 2024-Jun-02
Distance of closest approach* 1.54560177 AU
231,218,735 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.