Comet 53P/Van Biesbroeck July 9, 2016 with plotted syndynes

Comet 53P/Van Biesbroeck about 70 days past perihelion

Time Stamp: 2016 07 09, 9:25:59 UT

Motion: 0.22"/min in PA 229.0°

Stack of 4 x 600 seconds

Coma 81" x 50" extended PA 255 degrees

Tail 0.1 arc minutes PA 260 degrees

Charles Bell H47 Vicksburg

0.3-m Schmidt-Cassegrain + CCD + R band filter

 

Magnitude 15.3 R with 9.35 arc sec aperture radius

I am seeing a concentration of large particles like a spline that line up near a zero velocity syndyne with beta of 0.0010 with about 1 mm diameter.

 

Assuming dust density = 1000 kg/m^3, dust particle radius = 5.67E-4meters or about 567 microns

 

According to the width of the tail, there appears to be a range of smaller dust particles.

 

Plotted syndynes: beta: 0.0010, 0.0100, 0.1000, 0.2000

 

Ephemeris data:

t - T = +70.45192 days

delta = 1.564 AU

r = 2.494 AU

Elongation = 149.6 degrees

Phase = 11.9 degrees

PsAng = 245.4 degrees

PsAMV = 260.1 degrees

PlAng = -2.8 degrees, earth below comet orbit plane

Done