A/2018 W1
ephemeris date magn radius delta ra dec elong phase PA
Nearest approach10 Dec 201819.42.344 AU1.539 AU01h47m+29°19'135.3°17.2°86°
Today14 Dec 201819.42.296 AU1.544 AU01h42m+26°03'129.1°19.4°80°
Perihelion2 May 201919.11.359 AU1.910 AU03h57m-22°39'43.0°30.4°150°
A/2018 W1 - 2018-12-14

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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 A/2018 W1, as provided by the minor planet center, are:

            e (eccentricity)                : 0.9370210
            q (perihelion distance)         : 1.35920
            i (inclination)                 : 83.24320
            Ω (Longitude of ascending node) : 233.60200
            ω (Argument of perihelion)      : 251.29700
            L (Longitude of perihelion)     : 252.76626
            B (Latitude of perihelion)      : -70.15505
            T (Time of perihelion passage)  : 2458605.35790
            P (Orbital period in years)     : 100.26

            Family/Group:                   : Nearly isotropic

The lightcurve 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 lightcurves are shown: The gray curve indicates the expected brightness if this object is a comet (14.60 + 5 log[∆] + 10.00 log[r]), whereas the red curve indicates the expected lightcurve for an asteroid (H=15.70; G=.15).

The all-sky chart below shows the path of of the comet over the same period as the lightcurve. The comet's current position is marked yellow.

The following chart show the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
A more printer-friendly versions of the same chart can be found further down this page as well.