C/2019 Y4 (ATLAS)
ephemeris date magn radius delta ra dec elong phase PA
Today21 Jan 202018.32.594 AU1.855 AU11h52m+37°52'129.5°17.0°265°
Nearest approach23 May 20207.70.356 AU0.781 AU03h47m+37°52'17.5°121.3°349°
Perihelion30 May 20206.50.252 AU0.869 AU03h38m+20°00'12.6°118.4°259°
C/2019 Y4 (ATLAS)- 2020-01-21

-1 month
-1 week
-1 day
+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 C/2019 Y4 (ATLAS), as provided by the minor planet center, are:

            e (eccentricity)                : 0.9986695
            q (perihelion distance)         : 0.2522871
            i (inclination)                 : 45.27974
            Ω (Longitude of ascending node) : 120.47328
            ω (Argument of perihelion)      : 177.54315
            L (Longitude of perihelion)     : 118.74399
            B (Latitude of perihelion)      : 1.74545
            T (Time of perihelion passage)  : 2459000.49149
            P (Orbital period in years)     : 2611.08
            Epoch                           : 2020 May 31

            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 light curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the minor planet center. (12.75 + 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.