C/2015 X4 (Elenin)

DEPARTED

Type: Periodic Perihelion date: 3 November 2015 Perihelion distance (q): 3.4 Aphelion distance (Q) : 32.9 Period (years): 77.2 Eccentricity (e): 0.81 Inclination (i): 29.5 JPL orbit diagram COBS lightcurve Leonid Elenin discovered an 18th magnitude comet with the ISON-NM 0.4m reflector at Mayhill on 3 December 2015. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 10-Dec-15 17.53 0.14 17.3 0.2 16-Dec-15 16.19 0.02 15.9 0.2 04-Feb-16 17.18 0.02 16.7 0.2