ephemeris date magn radius delta ra dec elong phase PA
Today4 Dec 202312.62.351 AU2.570 AU18h31m+38°27'66.1°22.5°29°
Perihelion21 Apr 20244.30.781 AU1.605 AU03h28m+09°50'22.7°29.7°97°
Nearest approach2 Jun 20246.51.099 AU1.546 AU05h52m-19°32'45.2°40.9°157°
12P/Pons-Brooks- 2023-12-04

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The interactive orbit chart above shows the comet's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below. (Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)

The orbital elements of 12P/Pons-Brooks are:

            e (Eccentricity)                : 0.9545910
            q (Perihelion distance)         : 0.7807820
            i (Inclination)                 : 74.19110
            Ω (Longitude of ascending node) : 255.85640
            ω (Argument of perihelion)      : 198.98980
            L (Longitude of perihelion)     : 261.21227
            B (Latitude of perihelion)      : -18.24566
            T (Time of perihelion passage)  : 2460421.62230
            P (Orbital period in years)     : 71.30

            Epoch                           : 2023 Dec 03
            Reference                       : MPEC 2023-W26

            Classification(s):              : Halley type (P < 200 years)

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC. The gray curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (5.00 + 5 log[∆] + 15.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 4.93 + 5 log[∆] + 15.00 log[r]).