C/2019 T4 (ATLAS)
ephemeris date magn radius delta ra dec elong phase PA
Today2 Dec 202015.06.143 AU5.929 AU08h33m-38°01'98.0°9.1°306°
Nearest approach4 Apr 202210.74.277 AU3.330 AU11h50m-20°41'158.6°4.9°48°
Perihelion9 Jun 202211.04.242 AU3.898 AU11h51m-07°30'102.9°13.5°112°
C/2019 T4 (ATLAS)- 2020-12-02

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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 T4 (ATLAS), as provided by the minor planet center, are:

            e (eccentricity)                : 0.9959150
            q (perihelion distance)         : 4.2417920
            i (inclination)                 : 53.61760
            Ω (Longitude of ascending node) : 199.95810
            ω (Argument of perihelion)      : 351.21570
            L (Longitude of perihelion)     : 194.72092
            B (Latitude of perihelion)      : -7.06223
            T (Time of perihelion passage)  : 2459739.77370
            P (Orbital period in years)     : > 9999.99 
            Epoch                           : 2020 Dec 01

            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 -4.28 + 5 log[∆] + 19.61 log[r]).