2I/Borisov
ephemeris date magn radius delta ra dec elong phase PA
Perihelion8 Dec 201915.62.007 AU1.994 AU11h28m-18°19'76.4°28.5°290°
Nearest approach28 Dec 201915.72.053 AU1.937 AU11h59m-33°17'82.4°28.3°293°
Today25 Feb 202125.89.510 AU9.709 AU17h25m-59°12'75.5°5.8°263°
2I/Borisov- 2021-02-25
astro.vanbuitenen.nl


 
-1 month
-1 week
-1 day
Now
+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 2I/Borisov, as provided by the minor planet center, are:

            e (eccentricity)                : 3.3566360
            q (perihelion distance)         : 2.0065480
            i (inclination)                 : 44.05270
            Ω (Longitude of ascending node) : 308.14800
            ω (Argument of perihelion)      : 209.12510
            L (Longitude of perihelion)     : 329.97095
            B (Latitude of perihelion)      : -19.78093
            T (Time of perihelion passage)  : 2458826.05490

            Epoch                           : 2019 Dec 23
            Reference                       : MPEC 2020-K19

            Classification(s):              : 
        

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 (11.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 11.11 + 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.