C/2018 U1 (Lemmon)
ephemeris date magn radius delta ra dec elong phase PA
Today3 Dec 202016.55.607 AU6.397 AU17h46m+07°34'34.0°5.6°29°
Nearest approach18 Jun 202115.35.104 AU4.142 AU17h18m-03°39'159.1°4.1°161°
Perihelion2 Nov 202115.94.994 AU5.834 AU16h32m-22°15'29.4°5.6°99°
C/2018 U1 (Lemmon)- 2020-12-03

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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/2018 U1 (Lemmon), as provided by the minor planet center, are:

            e (eccentricity)                : 1.0010450
            q (perihelion distance)         : 4.9936130
            i (inclination)                 : 108.29960
            Ω (Longitude of ascending node) : 75.47870
            ω (Argument of perihelion)      : 180.42640
            L (Longitude of perihelion)     : 75.34481
            B (Latitude of perihelion)      : -0.40484
            T (Time of perihelion passage)  : 2459521.31470
            P (Orbital period in years)     : > 9999.99 
            Epoch                           : 2020 Dec 02

            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 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[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 6.59 + 5 log[∆] + 7.88 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.