C/2025 J1 (Borisov)

Type: Periodic Perihelion date: 11 June 2026 Perihelion distance (q): 3.6 Aphelion distance (Q) : 16,056 Period (years): 719,506 Eccentricity (e): 1.00 Inclination (i): 95.4 JPL orbit diagram COBS lightcurve Atlas Gennady Borisov discovered a 19th magnitude comet in images taken with the MARGO 0.5-m f/1.9 reflector at Nauchnij, Crimea on 2 May 2025. There were pre- discovery images from the ZTF on 29 April and 2 May. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 31-May-25 19.0 0.4 29-Jun-25 19.4 0.4 02-Dec-25 17.6 0.2