C/2017 B3 (LINEAR)
ephemeris date magn radius delta ra dec elong phase PA
Perihelion2 Feb 201913.83.922 AU4.577 AU21h23m-60°15'43.6°10.0°173°
Nearest approach19 Aug 201914.44.278 AU3.481 AU00h01m-46°03'137.2°9.3°311°
Today31 May 202016.05.638 AU6.019 AU00h34m-03°09'63.3°9.2°244°
C/2017 B3 (LINEAR)- 2020-05-31

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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/2017 B3 (LINEAR), as provided by the minor planet center, are:

            e (eccentricity)                : 1.0019060
            q (perihelion distance)         : 3.9219560
            i (inclination)                 : 54.17490
            Ω (Longitude of ascending node) : 2.17940
            ω (Argument of perihelion)      : 284.78000
            L (Longitude of perihelion)     : -63.55646
            B (Latitude of perihelion)      : -51.62643
            T (Time of perihelion passage)  : 2458517.13280
            P (Orbital period in years)     : > 9999.99 
            Epoch                           : 2020 May 30

            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 (6.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 4.58 + 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.

The following chart shows the current location of the comet in a smaller, upside-down telescopic field of view.

A printable version of the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.