C/2021 C4 (ATLAS)

DEPARTED

Type: Periodic Perihelion date: 17 January 2021 Perihelion distance (q): 4.5 Aphelion distance (Q) : 14,688 Period (years): 629,650 Eccentricity (e): 1.00 Inclination (i): 132.8 JPL orbit diagram COBS lightcurve A 19th magnitude object was discovered in images taken with the 0.5m Schmidt at Haleakala on 12 February 2021 by the ATLAS (Asteroid Terrestrial-impact Last Alert System) team. It was posted on the PCCP as A10vcA4 following reports of signs of cometary activity. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 18-Apr-21 17.1 0.4 04-May-21 17.1 0.4 05-May-21 17.3 0.4 13-May-21 16.9 0.4 02-Jul-21 18.6 0.4