C/2023 X1 (Leonard)
ephemeris date magn radius delta ra dec elong phase PA
Perihelion18 Oct 202315.90.951 AU1.690 AU11h35m-18°15'29.0°30.6°256°
Nearest approach23 Dec 202316.71.462 AU1.024 AU13h23m+45°01'93.4°42.2°300°
Today22 Apr 202422.32.931 AU3.325 AU02h30m+70°45'58.7°17.0°
C/2023 X1 (Leonard)- 2024-04-22

-1 month
-1 week
-1 day
+1 day
+1 week
+1 month

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/2023 X1 (Leonard) are:

            e (Eccentricity)                : 0.9940830
            q (Perihelion distance)         : 0.9505070
            i (Inclination)                 : 110.58720
            Ω (Longitude of ascending node) : 137.01170
            ω (Argument of perihelion)      : 321.47030
            L (Longitude of perihelion)     : 152.65389
            B (Latitude of perihelion)      : -35.67165
            T (Time of perihelion passage)  : 2460235.58400
            P (Orbital period in years)     : 2036.01

            Epoch                           : 2024 Apr 21
            Reference                       : MPEC 2024-GJ3

            Classification(s):              : Nearly isotropic; Returning (a < 10000 AU); External (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 (13.50 + 5 log[∆] + 8.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 15.03 + 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.