C/2025 B2 ( Borisov )

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Updated on July 28, 2026

Profile Discovery Date January 20, 2025 Magnitude 20.3 mag Discoverer Gennady Borisov (Nauchnij, Crimea) Pictures

Orbital Elements Epoch 2026 June 9.0 TT = JDT 2461200.5 T 2026 Sept. 11.93602 TT Pike q 8.2387934 (2000.0) P Q z -0.0002907 Peri. 78.87052 +0.04703581 -0.08186541 +/-0.0000037 Node 84.87062 -0.21617816 -0.97385079 e 1.0023947 Incl. 91.74613 +0.97522030 -0.21192614 From 316 observations 2025 Jan. 8-2026 June 27, mean residual 0".5.

Magnitudes Graph m1 = -19.0 + 5 log d + 35.0 log r

The orbital elements are published on M.P.E.C. 2026-N12. The magnitudes graphs are made with Comet for Windows.