C/2018 Y1 (Iwamoto)

DEPARTED

Type: Periodic Perihelion date: 7 February 2019 Perihelion distance (q): 1.3 Aphelion distance (Q) : 287 Period (years): 1,733 Eccentricity (e): 0.99 Inclination (i): 160.4 JPL orbit diagram COBS lightcurve Masayuki Iwamoto (Awa, Tokushima, Japan) discovered another comet in images taken on 18 December 2018 with a 10-cm f/4.0 Pentax SDUF II telephoto lens and a Canon EOS 6D camera. The comet was around 13th magnitude with a well condensed coma. It had been posted on the PCCP as IF032. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 22-Dec-18 15.15 0.03 12.5 0.9 06-Jan-19 14.39 0.05 11.2 3.9 11-Jan-19 14.42 0.00 11.4 4.6 28-Aug-19 18.09 0.04 16.0 0.3 24-Sep-19 18.52 0.20 15.3 0.2 01-Oct-19 18.49 0.16 17.1 0.3