C/2018 U1 (Lemmon)

DEPARTED

Type: Hyperbolic Perihelion date: 2 November 2021 Perihelion distance (q): 5.0 Aphelion distance (Q) : n/a Period (years): n/a Eccentricity (e): 1.00 Inclination (i): 108.3 JPL orbit diagram COBS lightcurve An apparently asteroidal object of 20th magnitude was found in Mt Lemmon Survey images taken with the 1.5m reflector on 27 October 2018. It was placed on the PCCP as ZU8D586 and follow up observations showed that it was slightly diffuse. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 08-Jun-19 18.57 0.04 18.4 0.2 25-Jun-19 18.61 0.15 18.6 0.2 08-Aug-19 18.43 0.07 18.4 0.2 27-Aug-19 18.27 0.02 18.0 0.2 03-Sep-19 18.28 0.04 17.4 0.3 18-Sep-19 18.26 0.06 18.1 0.2 30-Sep-19 18.22 0.11 18.0 0.2 16-Oct-19 18.19 0.11 18.1 0.2 26-May-20 17.19 0.01 17.0 0.2 20-Feb-21 15.7 0.4 19-Mar-21 15.3 0.4 14-Apr-21 15.2 0.4 04-May-21 14.6 0.4 14-May-21 14.7 0.4 04-Jun-21 15.35 0.02 14.7 0.4 14-Jun-21 15.23 0.03 14.8 0.4 01-Jul-21 15.37 0.03 15.0 0.4