161P/Hartley-IRAS (2026)

Japanese version Home page

Updated on September 4, 2026

Profile Recovery Date June 23 and June 25, 2026 Magnitude 18.6 mag and 18.4 mag Recoverer H. Sato (Bunkyo-ku, Tokyo, Japan), M. Masek (Institute of Physics, Czech Academy of Sciences) Pictures

Orbital Elements Epoch 2026 June 9.0 TT = JDT 2461200.5 T 2026 Nov. 27.18515 TT Pike q 1.2651073 (2000.0) P Q n 0.04593493 Peri. 47.06753 +0.68281185 -0.73014524 a 7.7216007 Node 1.47508 -0.34141658 -0.34988279 e 0.8361600 Incl. 95.79086 +0.64591230 +0.58691564 P 21.5 From 371 observations 2004 Nov. 3-2026 Aug. 25, mean residual 0".7. Nongravitational parameters A1 = +0.47, A2 = -0.1215.

Finding Charts

Magnitudes Graph m1 = 7.9 + 5 log d + 19.5 log r(t - 20) [ ,20] ( - 2026 Dec. 17) m1 = 6.3 + 5 log d + 35 log r(t - 20) [20, ] (2026 Dec. 17 - )

The orbital elements are published on M.P.E.C. 2026-Q97. The charts are made with StellaNavigator Ver.10 (AstroArts). The magnitudes graphs are made with Comet for Windows.