Comets - 53P/van Biesbroeck - 0053P
Type Periodic Perihelion Date 29 April 2016 Perihelion Distance (q) 2.4 Aphelion Distance (Q) 8.4 Period (Years)   12.6 Eccentricity (e)   0.55 Inclination (i)   6.6 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 2 December 2018
COMETS COMETS
DEEP SKY DEEP SKY
During an unsuccessful attempt to recover the asteroid 1953 GC, George van Biesbroeck (Yerkes Observatory, Wisconsin, USA) discovered this comet on a 16-minute exposure obtained with the 24-inch reflector on 1 September 1954. He estimated the magnitude as 14.5, and described the comet as round, well condensed, and 8 arc seconds across. Stan Milbourn and George Lea calculated the best recovery orbit and the comet was recovered in May 1965. Back calculating the orbit shows that it made a moderately close approach to Jupiter in 1850, which reduced q from 2.7 to 2.4 au and reversed the nodes. The pre 1850 orbit is very similar to that of 42P/Neujmin 3 and it is likely that they are fragments of the same parent. Date 10x10 mag Error Kphot mag Coma ' 16 Feb 15 18.55 0.39 17.7 0.2 1 Mar 15 18.16 0.12 17.5 0.2 11 Mar 15 17.87 0.11 16.1 0.2 18 Mar 15 17.93 0.03 17.8 0.2 08-Apr-15 17.21 0.17 15.0 0.2 15-Apr-15 17.48 0.04 17.1 0.2 22-Apr-15 17.62 0.05 17.5 0.2 22-May-15 17.31 0.11 16.5 0.2 10-Jun-15 17.47 0.15 17.0 0.2 20-Jun-15 17.41 0.12 17.2 0.2 05-Jul-15 17.39 0.12 16.8 0.2 20-Jul-15 17.43 0.09 17.3 0.2 17-May-16 15.35 0.12 12.3 0.5 31-May-16 15.40 0.02 13.6 0.6 11-Jul-16 14.83 0.01 13.0 0.8 23-Aug-16 14.93 0.01 13.0 0.6 30-Aug-16 15.00 0.03 12.8 0.9 06-Sep-16 15.27 0.01 13.4 0.7 19-Sep-16 15.62 0.01 13.6 0.5 30-Sep-16 15.78 0.01 13.7 0.5 28-Oct-16 16.30 0.01 14.1 0.2 24-Nov-16 16.71 0.01 15.1 0.3 27-Dec-16 17.05 0.07 14.8 0.3 08-Jan-17 17.29 0.22 15.7 0.2 31-Jul-17 18.83 0.09 17.8 0.2
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