ephemeris date magn radius delta ra dec elong phase PA
Perihelion25 Jun 20206.70.337 AU1.192 AU07h23m+21°39'15.0°51.5°100°
Nearest approach30 Jul 20209.80.867 AU0.622 AU11h51m-15°13'58.1°84.3°124°
Today19 Sep 202014.51.624 AU1.392 AU17h14m-31°13'83.7°37.9°96°
2P/Encke- 2020-09-19

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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 2P/Encke, as provided by the minor planet center, are:

            e (eccentricity)                : 0.8480110
            q (perihelion distance)         : 0.3367240
            i (inclination)                 : 11.76500
            Ω (Longitude of ascending node) : 334.54950
            ω (Argument of perihelion)      : 186.56610
            L (Longitude of perihelion)     : 340.97883
            B (Latitude of perihelion)      : -1.33601
            T (Time of perihelion passage)  : 2459026.34610
            P (Orbital period in years)     : 3.30
            Epoch                           : 2020 Sep 18

            Family/Group:                   : Encke family
            Tisserand (Jupiter)             : 3.026

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 (11.50 + 5 log[∆] + 15.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 11.50 + 5 log[∆] + 10.93 log[r]). The additional green curve shows the effect of forward scattering, occurring when the comet is between the earth and the sun, for a gas-to-dust light ratio δ90 of 0.30. (See Marcus 2007)