C/2019 J1 (Lemmon)
ephemeris date magn radius delta ra dec elong phase PA
Perihelion9 Apr 201918.92.479 AU2.301 AU19h26m-16°27'88.1°23.8°262°
Nearest approach2 Jul 201918.42.638 AU1.672 AU20h23m-30°24'157.0°8.7°283°
Today15 Sep 201919.72.994 AU2.341 AU20h09m-39°20'121.7°16.6°65°
C/2019 J1 (Lemmon) - 2019-09-15

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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/2019 J1 (Lemmon), as provided by the minor planet center, are:

            e (eccentricity)                : 0.9654767
            q (perihelion distance)         : 2.47873
            i (inclination)                 : 24.54999
            Ω (Longitude of ascending node) : 98.08733
            ω (Argument of perihelion)      : 167.79816
            L (Longitude of perihelion)     : 86.95971
            B (Latitude of perihelion)      : 5.03796
            T (Time of perihelion passage)  : 2458582.85084
            P (Orbital period in years)     : 608.38

            Family/Group:                   : Nearly isotropic

The lightcurve 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 lightcurve is based on the absolute magnitide and slope parameter as calculated from the original MPEC, or the latest values provided by the minor planet center. (13.10 + 5 log[∆] + 10.00 log[r]).

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

The following chart shows the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
A more printer-friendly version of the same chart can be found further down this page as well.