Comets - C/2018 Y1 (Iwamoto) - CK18Y010
Type Periodic Perihelion Date 7 February 2019 Perihelion Distance (q) 1.3 Aphelion Distance (Q) 258.2 Period (Years) 1,478 Eccentricity (e) 0.99 Inclination (i) 160.4 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 26 May 2020
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. The very preliminary orbit suggests that the comet might have been discovered by a southern hemisphere survey telescope earlier in the year. It then passed through solar conjunction and has just emerged into the morning sky. The comet is probably approaching perihelion in late January at 1.1 au and may then pass 0.2 au from the Earth in early February when it could be 6th magnitude. The preliminary orbit is based on an arc of only two days and should be regarded as very provisional. Date 10x10 mag Error Kphot mag 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 0.01 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