C/2017 D2 (Barros)
ephemeris date magn radius delta ra dec elong phase PA
Perihelion14 Jul 201715.32.491 AU1.582 AU22h00m-34°11'146.1°13.2°282°
Nearest approach7 Aug 201715.32.504 AU1.510 AU21h38m-29°41'165.1°6.0°331°
Today20 Jan 202126.311.047 AU10.536 AU03h36m+53°00'119.0°4.5°95°
C/2017 D2 (Barros)- 2021-01-20

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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/2017 D2 (Barros), as provided by the minor planet center, are:

            e (eccentricity)                : 0.9994770
            q (perihelion distance)         : 2.4905110
            i (inclination)                 : 31.25760
            Ω (Longitude of ascending node) : 330.95480
            ω (Argument of perihelion)      : 334.52830
            L (Longitude of perihelion)     : 308.79761
            B (Latitude of perihelion)      : -12.89442
            T (Time of perihelion passage)  : 2457949.40020
            P (Orbital period in years)     : > 9999.99 
            Epoch                           : 2021 Jan 19
            Reference                       : MPC112391

            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 (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 10.19 + 5 log[∆] + 10.50 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.