Comets - C/2015 V1 PANSTARRS - CK15V010
Type Hyperbolic Perihelion Date 17 December 2017 Perihelion Distance (q) 4.3 Aphelion Distance (Q) n/a Period (Years)   n/a Eccentricity (e)   1.00 Inclination (i)   139.2 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 6 May 2018
COMETS COMETS
DEEP SKY DEEP SKY
A 20th magnitude comet was discovered in PanSTARRS 1 images taken with the 1.8m Ritchey- Chretien on 2 November 2015.  The MPC preliminary elements suggested that the comet was at perihelion at 0.3 au in October 2014. This seemed somewhat unlikely as the comet should have been visible as a moderately bright northern hemisphere object after perihelion. JPL gave a 1-sigma uncertainty in the time of perihelion of 110 days, so the elements were likely to change substantially. MPEC 2015-V61 issued the next day gave perihelion at 4.4 au in December 2017. The perihelion distance is now given as 4.3 au. Date 10x10 mag Error Kphot mag Coma ' 29-Sep-16 17.19 0.15 16.7 0.2 06-Oct-16 16.92 0.03 16.2 0.3 28-Oct-16 16.82 0.02 16.6 0.2 26-Nov-16 16.53 0.01 16.0 0.3 19-Dec-16 16.78 0.02 16.1 0.3 30-Dec-16 16.68 0.01 16.1 0.3 18-Jan-17 16.77 0.02 16.3 0.3 15-Feb-17 16.75 0.20 15.8 0.3 21-Jul-17 16.54 0.02 15.6 0.5 30-Jul-17 16.51 0.04 15.1 0.4 17-Aug-17 16.31 0.04 14.9 0.6 24-Aug-17 16.39 0.02 15.2 0.5 16-Sep-17 16.18 0.02 14.9 0.7 28-Sep-17 16.03 0.02 14.6 0.7 20-Nov-17 16.46 0.02 15.2 0.7 03-Jan-18 16.91 0.02 15.7 0.7