ephemeris date magn radius delta ra dec elong phase PA
Today14 Oct 201916.62.343 AU2.737 AU09h52m+16°59'56.7°20.8°292°
Perihelion8 Dec 201914.92.007 AU1.994 AU11h28m-18°19'76.4°28.5°290°
Nearest approach27 Dec 201915.02.053 AU1.937 AU11h59m-33°09'82.4°28.4°293°
2I/Borisov- 2019-10-14

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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 2I/Borisov, as provided by the minor planet center, are:

            e (eccentricity)                : 3.3569000
            q (perihelion distance)         : 2.00661
            i (inclination)                 : 44.05172
            Ω (Longitude of ascending node) : 308.14878
            ω (Argument of perihelion)      : 209.12413
            L (Longitude of perihelion)     : 329.97127
            B (Latitude of perihelion)      : -19.77994
            T (Time of perihelion passage)  : 2458826.05424
            P (Orbital period in years)     : > 9999.99 

            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. Two light curves are shown: 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 (10.92 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 10.41 + 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.

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.