Type Hyperbolic Perihelion Date 18 January 2019 Perihelion Distance (q) 3.3 Aphelion Distance (Q) n/a Period (Years) n/a Eccentricity (e) 1.0 Inclination (i) 105.7 Click for NASA orbit diagram

An 18th magnitude comet was discovered in images taken with the 0.5m Schmidt at Haleakala on 21 June 2017 by the ATLAS (Asteroid Terrestrial-impact Last Alert System) team. There were PanSTARRS images from 16 June. Date 10x10 mag Error Kphot mag Coma ' 28-Jun-17 18.24 0.06 17.9 0.3 16-Jul-17 17.61 0.13 17.5 0.2 30-Jul-17 17.71 0.11 17.2 0.3 13-Aug-17 17.61 0.04 17.4 0.3 20-Aug-17 17.76 0.07 17.2 0.3 30-Aug-17 17.70 0.10 17.1 0.3 09-Sep-17 17.37 0.03 16.7 0.3 17-Sep-17 17.60 0.06 17.2 0.3 25-Sep-17 17.49 0.03 17.2 0.3 11-Oct-17 17.52 0.03 17.0 0.3 27-Oct-17 17.18 0.05 16.0 0.3 23-Nov-17 16.94 0.06 16.5 0.3 14-Feb-18 16.38 0.02 15.8 0.3 13-Mar-18 16.25 0.03 15.3 0.3 10-Apr-18 15.68 0.04 13.7 0.5 17-Apr-18 15.92 0.02 15.1 0.4 09-May-18 15.69 0.01 14.7 0.6 21-May-18 15.56 0.01 14.3 0.5 04-Jun-18 15.50 0.02 14.1 0.7 08-Jun-18 15.50 0.01 14.4 0.6 13-Jul-18 15.42 0.01 14.0 0.9 03-Aug-18 15.34 0.01 14.0 0.9 10-Aug-18 15.36 0.01 13.7 1.0 28-Aug-18 15.32 0.04 13.6 0.9 10-Sep-18 15.33 0.04 13.6 1.0 08-May-19 14.37 0.03 11.9 1.3 27-May-19 13.87 0.07 11.2 1.2

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