P/2021 R4 (Wierzchos)
ephemeris date magn radius delta ra dec elong phase PA
Nearest approach4 Oct 202120.42.332 AU1.404 AU00h02m+31°34'151.3°11.9°160°
Perihelion13 Oct 202120.42.330 AU1.415 AU23h54m+31°55'149.5°12.6°137°
Today23 Jun 202428.36.480 AU7.005 AU09h50m+08°14'55.3°7.4°113°
P/2021 R4 (Wierzchos)- 2024-06-23

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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 P/2021 R4 (Wierzchos) are:

            e (Eccentricity)                : 0.5857570
            q (Perihelion distance)         : 2.3304170
            i (Inclination)                 : 21.02340
            Ω (Longitude of ascending node) : 321.29400
            ω (Argument of perihelion)      : 56.72620
            L (Longitude of perihelion)     : 16.18601
            B (Latitude of perihelion)      : 17.45371
            T (Time of perihelion passage)  : 2459501.46930
            P (Orbital period in years)     : 13.34

            Epoch                           : 2024 Jun 21
            Reference                       : MPEC 2021-W31

            Classification(s):              : Ecliptic; Jupiter family
            Tisserand (Jupiter)             : 2.498

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 an MPEC, or the latest values provided by the minor planet center. (16.00 + 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.