Comets - 185P/Petriew - 0185P
Type Periodic Perihelion Date 27 January 2018 Perihelion Distance (q) 0.9 Aphelion Distance (Q) 5.3 Period (Years)   5.5 Eccentricity (e)   0.70 Inclination (i)   14.0 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 14 August 2018
Vance Avery Petriew, Regina, SK, reported his visual discovery of an 11th mag comet during a star party at Cypress Hills Interprovincial Park, Saskatchewan on 18 August 2001. The object's presence was also confirmed visually by R. Huziak (0.25-m reflector) and P. Campbell (0.32-m reflector) at Cyprus Hills. Additional astrometry and orbital elements by B. G. Marsden, Smithsonian Astrophysical Observatory and S. Nakano, Sumoto, Japan, suggested that the comet should have been within visual range since July, which suggests that either the comet had recently outburst (or has a steep light curve) or that the morning sky was not well patrolled by amateur comet hunters. The recovery of 2001 Q2 (P/Petriew) was announced in the IAUC on 14 January 2007, although details of the recovery by Filip Fratev had been posted on the comets mailing list on 12 January. The comet was 16th magnitude at recovery. Date 10x10 mag Error Kphot mag Coma ' 2 Feb 13 18.83 0.05 18.6 0.1 14-Feb-18 14.99 0.04 11.8 0.4 14-Mar-18 15.78 0.03 12.5 1.5