175P/Hergenrother (0175P)

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Type: Periodic Perihelion date: 2 October 2019 Perihelion distance (q): 1.9 Aphelion distance (Q) : 4.9 Period (years): 6.4 Eccentricity (e): 0.43 Inclination (i): 6.1 JPL orbit diagram COBS lightcurve C. W. Hergenrother (Lunar and Planetary Laboratory, Arizona, USA) discovered this comet with the 0.41-m f/3 Schmidt telescope in the course of the Catalina Sky Survey on 4 February 2000. He determined the magnitude as 17.1. One of the four CCD images revealed a tail extending 11 arc seconds toward PA 300°. Prediscovery observations were found on Lincoln Laboratory Near- Earth Asteroid Research (LINEAR) project images made on 4 and 8 January, with nuclear magnitudes ranging from 18.7 to 19.4. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 05-Jan-13 17.43 0.05 17.1 0.3 15-Jan-13 18.11 0.05 17.6 0.3 02-Feb-13 16.33 0.04 15.2 0.2 14-Feb-13 17.26 0.04 16.7 0.2 10-Apr-13 16.93 0.04 15.6 0.3 25-Apr-13 16.70 0.05 15.3 0.2 23-May-13 17.06 0.07 16.2 0.2 08-Jul-13 17.23 0.09 15.6 0.4 18-Jul-17 17.20 0.04 14.3 0.6 25-Jul-17 17.34 0.07 16.2 0.4 29-Jul-17 17.26 0.04 16.4 0.6 14-Aug-17 17.34 0.02 16.2 0.4 17-Aug-17 17.43 0.04 16.3 0.4 20-Aug-17 17.37 0.06 16.7 0.4 24-Aug-17 17.34 0.06 16.3 0.5 13-Sep-17 17.78 0.07 16.1 0.5 18-Sep-17 17.89 0.08 16.5 0.4 21-Sep-17 17.99 0.09 16.8 0.4 25-Sep-17 17.98 0.06 17.2 0.4 10-Oct-17 18.21 0.07 16.8 0.3 09-Dec-18 19.85 0.12 19.9 0.2