Comets - C/2018 C2 Lemmon - CK18C020
Type Hyperbolic Perihelion Date 2 June 2019 Perihelion Distance (q) 2.0 Aphelion Distance (Q) n/a Period (Years)   n/a Eccentricity (e)   1.0 Inclination (i)   34.5 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 6 May 2018
An asteroidal object of 20th magnitude was found in Mt Lemmon Survey images taken with the 1.5m reflector on 5 February 2018. It was placed on the PCCP as ZC82561, because it had a slightly hyperbolic orbit, but no cometary activity had been detected. It was therefore given a cometary letter designation with an A/ prefix. On 22 March, images taken with the 3.6m Canada-France-Hawaii showed a broad faint tail, though with only a marginal coma. The designation was therefore changed to C/. Date 10x10 mag Error Kphot mag Coma ' 10-Apr-18 16.65 0.02 16.1 0.5 21-Apr-18 16.29 0.02 15.4 0.6 06-May-18 16.11 0.01 16.0 0.3