C/2025 B2 (Borisov) _ CK25B020 _ gb00784 object ..

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C/2025 B2 (Borisov) _ CK25B020 _ gb00784 object (Feb. 9.77 UT), MPEC 2025-C153, CBET 5501
Ø кометного ядра 21 124 м

C2025 B2 (Borisov) _ CK25B020 _ gb00784 object (Feb. 9.77 UT) _ MPEC 2025-C153, CBET 5501 _ 2025 mag _ 24 02 2025 _ 1.gif

C2025 B2 (Borisov) _ CK25B020 _ gb00784 object (Feb. 9.77 UT) _ MPEC 2025-C153, CBET 5501 _ 21 00 UTC + 3 мск _ 09 02 2025 _ 1.gif

C2025 B2 (Borisov) _ CK25B020 _ gb00784 object (Feb. 9.77 UT) _ MPEC 2025-C153, CBET 5501 _ 09 02 2025 _ 1.png

C2025 B2 (Borisov) _ CK25B020 _ gb00784 object (Feb. 9.77 UT) _ MPEC 2025-C153, CBET 5501 _ 09 02 2025 _ 2.png

C2025 B2 (Borisov) _ CK25B020 _ gb00784 object (Feb. 9.77 UT) _ MPEC 2025-C153, CBET 5501 _ 09 02 2025 _ 3.png

C/2025 B2 (Borisov) / CK25B020 (Centaur, i=91.8°, q=8.260 AU, Q=11478.868 AU, TP=2026 Sept. 6.52 TT) was picked up at 1838 UT on 20 Jan. by MARGO, which observed it at Jan. 20.78-83p3, 20.91-94p3, 21.67-69p3, 25.80p1, 25.85p1, and 25.90p1. This detection was confirmed by Pan-STARRS 1 (PS1) (Jan. 8.29p1), Astronomical Research Obs. Westfield (Jan. 21.01-02p3), B. Stecklum via Schwarzschild Obs. (Jan. 21.71p6), Schafsweide Obs. (Jan. 21.79-80p2, 31.82-84p3, Feb. 1.77-79p3, 3.77-78p3 & 4.84-86p3), 29PREMOTE Obs. (Jan. 23.86-90p3), Zijinshan-Beimian Survey (Jan. 26.65-67p3), AZM Martinsberg (Jan. 26.85-86p3), Vasiliy Rumyantsev via Crimean Astrophysical Obs. (CrAO) (Jan. 27.79-80p13 & 28.77-80p20), Sandlot Obs. (Jan. 29.06-08p2), Kysuce Obs. (Jan. 29.78-80p3), San Marcello Pistoiese Obs. (Jan. 29.79-82p2), Jana Pittichova Chesley via Table Mtn. Obs. (Jan. 30.20-22p2, 31.16p1 & 31.21p1), Brixiis Obs. (Jan. 30.80-84p2), Schiaparelli Obs. (Jan. 30.90p1, 30.96p1 & 31.01-03p2), PS Obs. (Jan. 31.75-77p2), Olmen Obs. (Jan. 31.91-92p2, Feb. 1.87-88p2, 2.96-99p2 & 4.79-80p2), Starhopper Obs. (Feb. 1.69-72p3), Visnjan Obs. (Feb. 1.81-86p4), ROASTERR-1 (Feb. 1.84-87p2), Farra d'Isonzo Obs. (Feb. 1.86-92p3), St. Pardon de Conques Obs. (Feb. 1.89-92p3), Hidetaka Sato via iTelescope Obs. Beryl Jct. (Feb. 2.26p2), Sormano2 Obs. (Feb. 3.84-85p2), Monte Viseggi Obs. (Feb. 4.76p1 & 4.80p1), M. Tichy & team via KLENOT (Feb. 4.85p4), Sormano Obs. (Feb. 6.90-91p3), Steward Obs. Mt. Lemmon Station (Feb. 7.16-20p4 & 8.09-13p4), and R. Weryk via Univ. of Hawaii 88-inch telescope (UH88) (Feb. 8.25-26p4).

Orbital elements:
C/2025 B2 (Borisov)
Epoch 2025 May 5.0 TT = JDT 2460800.5
T 2026 Sept. 6.51740 TT Veres
q 8.2596195 (2000.0) P Q
z +0.0001742 Peri. 78.46954 +0.04816897 -0.08078124
+/-0.0000000 Node 84.90661 -0.20937765 -0.97539635
e 0.9985609 Incl. 91.78635 +0.97664771 -0.20512519
From 145 observations 2025 Jan. 8-Feb. 8, mean residual 0".6.

Ephemeris:
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2025 01 10 04 22 45.7 +71 36 12 8.4176 9.0055 124.1 5.2 20.4
...
2025 01 25 04 05 12.8 +71 09 02 8.5005 8.9709 115.7 5.7 20.4
...
2025 02 02 03 58 17.9 +70 49 27 8.5591 8.9527 110.5 5.9 20.4
...
2025 02 08 03 54 16.5 +70 33 45 8.6082 8.9392 106.5 6.1 20.4
2025 02 09 03 53 42.0 +70 31 06 8.6167 8.9370 105.9 6.1 20.4
2025 02 10 03 53 09.0 +70 28 27 8.6253 8.9347 105.2 6.1 20.4
...
2025 02 16 03 50 24.6 +70 12 39 8.6786 8.9214 101.1 6.2 20.4
...
2025 02 24 03 48 10.1 +69 52 27 8.7531 8.9038 95.6 6.4 20.4
...
2025 03 11 03 47 53.7 +69 20 24 8.8966 8.8713 85.3 6.4 20.4



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