P/2025 C1 (ATLAS)

Type: Periodic Perihelion date: 7 February 2025 Perihelion distance (q): 2.7 Aphelion distance (Q) : 5.6 Period (years): 8.6 Eccentricity (e): 0.34 Inclination (i): 7.5 JPL orbit diagram COBS lightcurve Atlas The ATLAS (Asteroid Terrestrial-impact Last Alert System) team discovered an 18th magnitude object in images taken with the 0.5 m Schmidt at Haleakala on 2 February 2025. It seems likely that the comet was discovered in outburst as it brightened by a magnitude 24 hours after discovery and there were no prediscovery observations. The orbit has a Jupiter MOID of 0.25 au. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 25-Feb-25 17.9 0.4 05-Mar-25 18.2 0.4 29-Mar-25 18.2 0.4 05-Apr-25 18.2 0.4 24-Apr-25 18.3 0.4