C/2020 H4 (Leonard)
ephemeris date magn radius delta ra dec elong phase PA
Today1 Jun 202018.01.736 AU1.595 AU22h35m+28°02'80.0°35.1°250°
Nearest approach9 Jul 202016.01.278 AU1.145 AU23h53m+77°52'72.2°49.2°246°
Perihelion29 Aug 202015.30.927 AU1.602 AU10h40m+41°48'32.6°35.9°
C/2020 H4 (Leonard)- 2020-06-01

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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 C/2020 H4 (Leonard), as provided by the minor planet center, are:

            e (eccentricity)                : 0.9847547
            q (perihelion distance)         : 0.9274655
            i (inclination)                 : 84.56071
            Ω (Longitude of ascending node) : 307.76453
            ω (Argument of perihelion)      : 117.48146
            L (Longitude of perihelion)     : 297.43653
            B (Latitude of perihelion)      : 62.02660
            T (Time of perihelion passage)  : 2459090.77475
            P (Orbital period in years)     : 474.51
            Epoch                           : 2020 May 03

            Family/Group:                   : Nearly isotropic

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 light curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the minor planet center. (14.61 + 5 log[∆] + 10.00 log[r]).

The all-sky chart below shows the path of the comet over the same period as the light curve. The comet's current position is marked yellow.