C/2017 D2 (Barros)

DEPARTED

Type: Periodic Perihelion date: 14 July 2017 Perihelion distance (q): 2.5 Aphelion distance (Q) : 2,758 Period (years): 51,284 Eccentricity (e): 1.00 Inclination (i): 31.3 JPL orbit diagram COBS lightcurve Brazilian amateur astronomer Joao Ribeiro de Barros discovered a 17th magnitude comet in images taken with the 0.45m f/2.9 reflector of the SONEAR observatory on 23 February 2017. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 14-Aug-17 16.34 0.01 14.4 0.4 20-Aug-17 16.41 0.06 14.4 0.5 27-Aug-17 16.43 0.03 14.9 0.6 10-Sep-17 16.97 0.11 15.0 0.5 18-Sep-17 17.08 0.07 15.4 0.3 25-Sep-17 17.37 0.08 16.3 0.3 12-Oct-17 17.84 0.17 16.5 0.3