C/2026 S2 ( ATLAS )

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Updated on October 17, 2026

Profile Discovery Date September 19, 2026 Magnitude 18.8 mag Discoverer Asteroid Terrestrial-Impact Last Alert System (ATLAS) search program

Orbital Elements Epoch 2026 June 9.0 TT = JDT 2461200.5 T 2027 May 31.68001 TT Rudenko q 4.3846990 (2000.0) P Q z +0.0045700 Peri. 303.75279 +0.65759866 +0.75164273 +/-0.0026139 Node 352.02001 +0.75334410 -0.65661489 e 0.9799618 Incl. 158.46337 -0.00605581 -0.06237068 From 75 observations 2026 Sept. 19-Oct. 8, mean residual 0".3.

Magnitudes Graph m1 = 8.0 + 5 log d + 10.0 log r

The orbital elements are published on M.P.E.C. 2026-T149. The magnitudes graphs are made with Comet for Windows.