C/2025 J1 ( Borisov )

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Updated on March 31, 2026

Profile Discovery Date May 2, 2025 Magnitude 19.3 mag Discoverer Gennady Borisov (Nauchnij, Crimea) Pictures

Orbital Elements Epoch 2025 Nov. 21.0 TT = JDT 2461000.5 T 2026 June 11.81021 TT Pike q 3.5803102 (2000.0) P Q z +0.0008055 Peri. 166.62390 -0.08935982 +0.07604635 +/-0.0000015 Node 273.97625 +0.79744052 +0.60285465 e 0.9971160 Incl. 95.44467 +0.59674404 -0.79421863 From 1576 observations 2025 Apr. 29-2026 Mar. 19, mean residual 0".4.

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

The orbital elements are published on M.P.E.C. 2026-F123. The magnitudes graphs are made with Comet for Windows.