C/2018 R3 (Lemmon)


Type: Periodic Perihelion date: 7 June 2019 Perihelion distance (q): 1.3 Aphelion distance (Q) : 3,939 Period (years): 87,446 Eccentricity (e): 1.00 Inclination (i): 69.7 JPL orbit diagram COBS lightcurve An apparently asteroidal object of 19th magnitude was found in Mt Lemmon Survey images taken with the 1.5m reflector on 7 September 2018. It was placed on the PCCP as ZRBBF83 and follow up observations by astrometrists showed that it was slightly diffuse and elongated. With a preliminary orbit, Gareth Williams was then able to find pre-discovery PanSTARRS images from August 2018. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 10-Oct-18 19.77 0.04 19.6 0.2 01-Dec-19 19.43 0.13 18.9 0.2