C/2021 T4 (Lemmon)

Type: Periodic Perihelion date: 31 July 2023 Perihelion distance (q): 1.5 Aphelion distance (Q) : 36,585 Period (years): 2,474,153 Eccentricity (e): 1.00 Inclination (i): 160.8 JPL orbit diagram COBS lightcurve The Mt Lemmon Survey discovered an object of 20th magnitude in images taken with the 1.5m reflector on 7 October 2021. Erik Bryssinck reported cometary activity in images taken with the Telescope Live 0.61-m reflector at El Sauce Observatory, Rio Hurtado, Chile on 11 October. There were pre-discovery images from PanSTARRS 1 in August, PanSTARRS 2 and Mt Lemmon in September and PanSTARRS 1 in October. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 27-Aug-22 17.2 0.4 06-Sep-22 17.00 0.02 17.0 0.4 21-Sep-22 16.42 0.05 16.7 0.4 30-Sep-22 16.6 0.4 19-Oct-22 16.14 0.04 16.2 0.4 27-Oct-22 16.02 0.03 16.1 0.4 13-Nov-22 16.04 0.02 16.1 0.4 22-Nov-22 15.9 0.4 29-Nov-22 16.14 0.04 16.1 0.4 03-Aug-23 9.6 7.0 16-Aug-23 10.8 5.3 15-Feb-24 17.5 0.4 22-Feb-24 17.3 0.4 06-Mar-24 17.6 0.4 14-Mar-24 17.4 0.4 01-Apr-24 17.6 0.4 11-May-24 19.0 0.4