C/2015 G2 (MASTER)
ephemeris date magn radius delta ra dec elong phase PA
Nearest approach13 May 20158.20.808 AU0.468 AU03h24m-33°16'51.7°101.3°179°
Perihelion24 May 20159.00.779 AU0.671 AU06h31m-14°10'50.2°88.3°133°
Today2 Jun 202029.115.774 AU16.689 AU03h42m+43°48'24.8°1.5°326°
C/2015 G2 (MASTER)- 2020-06-02

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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/2015 G2 (MASTER), as provided by the minor planet center, are:

            e (eccentricity)                : 1.0006310
            q (perihelion distance)         : 0.7786380
            i (inclination)                 : 147.66560
            Ω (Longitude of ascending node) : 110.25490
            ω (Argument of perihelion)      : 257.64470
            L (Longitude of perihelion)     : 34.78858
            B (Latitude of perihelion)      : -31.49822
            T (Time of perihelion passage)  : 2457167.47300
            P (Orbital period in years)     : > 9999.99 
            Epoch                           : 2020 Jun 01

            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 light curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the minor planet center. (11.00 + 5 log[∆] + 10.00 log[r]). The additional green curve shows the effect of forward scattering, occurring when the comet is between the earth and the sun, for a gas-to-dust light ratio δ90 of 1.00. (See Marcus 2007)

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.