Comets - 171P/Spahr - 0171P
Type Periodic Perihelion Date 13 January 2019 Perihelion Distance (q) 1.8 Aphelion Distance (Q) 5.3 Period (Years)   6.7 Eccentricity (e)   0.50 Inclination (i)   21.9 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 16 November 2018
COMETS COMETS
DEEP SKY DEEP SKY
T. B. Spahr (University of Arizona, Arizona, USA) discovered this comet with the 0.41-m f/3 Schmidt telescope in the course of the Catalina Sky Survey on 16 November 1998. He estimated the magnitude as 16.5 and noted a round coma 18 arc seconds across. No tail was visible. Additional images were obtained on 17 November, at which time the comet discovery was announced. A prediscovery image was later found on images taken by the Two Micron All Sky Survey (2MASS) on 13 November 1998. Date 10x10 mag Error Kphot mag Coma ' 06-Oct-18 18.83 0.14 18.6 0.2 13-Oct-18   18.57   0.03   17.7   0.4 08-Nov-18   17.61   0.02 16.2 0.4 15-Nov-18   17.30   0.02 15.9 0.5