ephemeris date magn radius delta ra dec elong phase PA
Today7 Jun 202316.71.908 AU1.496 AU22h17m+08°04'97.1°31.9°246°
Nearest approach26 Sep 202311.31.088 AU0.383 AU06h00m+35°00'92.3°67.1°270°
Perihelion12 Oct 202311.41.064 AU0.406 AU07h28m+21°03'88.0°69.6°279°
103P/Hartley- 2023-06-07

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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 103P/Hartley are:

            e (Eccentricity)                : 0.6937800
            q (Perihelion distance)         : 1.0640920
            i (Inclination)                 : 13.61030
            Ω (Longitude of ascending node) : 219.75100
            ω (Argument of perihelion)      : 181.30300
            L (Longitude of perihelion)     : 221.01742
            B (Latitude of perihelion)      : -0.30659
            T (Time of perihelion passage)  : 2460230.01840
            P (Orbital period in years)     : 6.48

            Epoch                           : 2023 Jun 07
            Reference                       : MPEC 2023-L10

            Classification(s):              : Ecliptic; Jupiter family
            Tisserand (Jupiter)             : 2.641

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 (14.20 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 13.06 + 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.