C/2021 A2 (NEOWISE)
ephemeris date magn radius delta ra dec elong phase PA
Today16 Jan 202111.81.416 AU0.758 AU09h53m-45°21'108.1°41.3°330°
Perihelion22 Jan 202111.41.413 AU0.621 AU09h03m-37°52'121.7°36.4°348°
Nearest approach3 Feb 202111.01.423 AU0.507 AU07h27m-11°13'142.8°24.7°42°
C/2021 A2 (NEOWISE)- 2021-01-16

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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), as provided by the minor planet center, are:

            e (eccentricity)                : 0.9994840
            q (perihelion distance)         : 1.4130330
            i (inclination)                 : 107.01210
            Ω (Longitude of ascending node) : 125.22150
            ω (Argument of perihelion)      : 338.91270
            L (Longitude of perihelion)     : 131.65841
            B (Latitude of perihelion)      : -20.12361
            T (Time of perihelion passage)  : 2459237.21430
            P (Orbital period in years)     : > 9999.99 
            Epoch                           : 
            Reference                       : MPEC 2021-AA0

            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 (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 10.94 + 5 log[∆] + 10.00 log[r]).