C/2021 A2 (NEOWISE)
ephemeris date magn radius delta ra dec elong phase PA
Perihelion22 Jan 202111.41.412 AU0.623 AU09h04m-38°07'121.3°36.6°347°
Nearest approach3 Feb 202111.11.422 AU0.506 AU07h27m-11°14'142.9°24.7°42°
Today27 Sep 202245.26.774 AU6.465 AU19h55m+59°58'103.7°8.3°112°
C/2021 A2 (NEOWISE)- 2022-09-27

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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/2021 A2 (NEOWISE) are:

            e (Eccentricity)                : 0.9941030
            q (Perihelion distance)         : 1.4122740
            i (Inclination)                 : 106.97980
            Ω (Longitude of ascending node) : 125.22140
            ω (Argument of perihelion)      : 338.80440
            L (Longitude of perihelion)     : 131.68244
            B (Latitude of perihelion)      : -20.23015
            T (Time of perihelion passage)  : 2459237.03070

            Epoch                           : 2022 Sep 26
            Reference                       : MPEC 2022-F14

            Classification(s):              : Nearly isotropic; New (a > 10000 AU)

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 (13.50 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 6.13 + 5 log[∆] + 42.17 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.