C/2025 J1 ( Borisov )

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Updated on April 29, 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 11.81095 TT Pike q 3.5803046 (2000.0) P Q z +0.0008024 Peri. 166.62416 -0.08935995 +0.07604613 +/-0.0000016 Node 273.97629 +0.79744324 +0.60285101 e 0.9971272 Incl. 95.44464 +0.59674038 -0.79422141 From 881 observations 2025 Apr. 29-2026 Apr. 19, mean residual 0".5.

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

The orbital elements are published on M.P.E.C. 2026-H170. The magnitudes graphs are made with Comet for Windows.