C/2011 F1 (LINEAR)

DEPARTED

Type: Hyperbolic Perihelion date: 8 January 2013 Perihelion distance (q): 1.8 Aphelion distance (Q) : n/a Period (years): n/a Eccentricity (e): 1.00 Inclination (i): 56.6 JPL orbit diagram COBS lightcurve LINEAR discovered an 18th magnitude object on 17 March 2011, which was seen to show a coma by astrometrists, including Peter Birtwhistle, Roger Banks and other observers. The comet was over 7 AU from the Sun at discovery. Visual observations in the first half of 2012 show it brightening to around 11th magnitude. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 28-Mar-13 15.67 0.03 13.4 0.3 02-May-13 16.03 0.07 14.3 0.2 21-Sep-13 17.16 0.04 16.4 0.2 01-Oct-13 17.39 0.03 16.2 0.3 11-Oct-13 17.43 0.06 16.6 0.2 23-Oct-13 17.66 0.09 16.4 0.3 03-Nov-13 17.83 0.06 16.8 0.3 13-Nov-13 17.49 0.07 14.3 0.2 26-Nov-13 17.66 0.07 16.4 0.3 07-Dec-13 17.81 0.05 16.6 0.3 09-Jan-14 18.47 0.22 18.2 0.2 10-Feb-14 19.21 0.61 18.9 0.2 21-Feb-14 18.87 0.09 18.1 0.2 21-Mar-14 19.08 0.01 18.8 0.2