C/2018 F1 (Grauer)

DEPARTED

Type: Periodic Perihelion date: 14 December 2018 Perihelion distance (q): 3.0 Aphelion distance (Q) : 642 Period (years): 5,790 Eccentricity (e): 0.99 Inclination (i): 46.1 JPL orbit diagram COBS lightcurve Al Grauer discovered a comet of 19th magnitude in Mt Lemmon Survey images taken with the 1.5m reflector on 17 March 2018. It was independently discovered a few hours later in PanSTARRS images and they also found pre-discovery images from 22 December 2017, 17 January and 10 March 2018. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 07-Apr-18 18.79 0.18 18.6 0.2 06-May-18 18.80 0.10 18.6 0.2 14-Jul-18 18.60 0.13 18.2 0.2