Comet P/2006 H1 = 2020 R3 (McNaught) この彗星は、9月11日と12日、Calar Alto-Schmidt (Z84)が得た画像から、E. Schwabが検出し 通報した。p.a.240°に10"の尾があった。 検出位置は次のとおり、 2020 UT R.A. (2000) Decl. Mag. Observer Sept.11.08791 2 02 11.31 +19 17 36.5 20.4 Schwab 11.09710 2 02 11.05 +19 17 38.4 20.5 " 11.10630 2 02 10.84 +19 17 39.4 20.3 " 11.11549 2 02 10.59 +19 17 40.0 20.0 " 12.09710 2 01 46.88 +19 20 03.0 20.3 " 12.10629 2 01 46.65 +19 20 04.4 20.2 " 12.15266 2 01 45.32 +19 20 11.1 19.2 " NK 3214とICQ's 2018-2020 Comet Handbookの中野主一氏の予報に対し、Delta(T)は、-0.39 dayで あった。MPC 58118のG. V. Williamsの予報に対するDelta(T)は-0.15 dayであった。 MPCの連結軌道要素と位置推算表は次のとおり、 Orbital elements: P/2006 H1 (McNaught) Epoch 2006 May 25.0 TT = JDT 2453880.5 T 2006 May 7.37927 TT Rudenko q 2.3784594 (2000.0) P Q n 0.07274427 Peri. 310.13422 +0.64627344 +0.76310575 a 5.6833384 Node 0.13028 -0.61473937 +0.52101512 e 0.5815031 Incl. 12.87030 -0.45213509 +0.38237791 P 13.5 From 221 observations 2006 Apr. 29-2020 Sept. 12, mean residual 0".6. P/2006 H1 (McNaught) Epoch 2019 Dec. 23.0 TT = JDT 2458840.5 T 2019 Dec. 7.06556 TT Rudenko q 2.4226974 (2000.0) P Q n 0.07103925 Peri. 309.27845 +0.63169530 +0.77521666 a 5.7739160 Node 359.89423 -0.62537720 +0.50928469 e 0.5804065 Incl. 12.80385 -0.45810959 +0.37372213 P 13.9 From 221 observations 2006 Apr. 29-2020 Sept. 12, mean residual 0".6. P/2006 H1 (McNaught) Epoch 2033 Oct. 10.0 TT = JDT 2463880.5 T 2033 Oct. 6.81094 TT Rudenko q 2.4304577 (2000.0) P Q n 0.07083004 Peri. 309.14776 +0.62931962 +0.77714637 a 5.7852802 Node 359.84841 -0.62683636 +0.50715423 e 0.5798894 Incl. 12.82420 -0.45938328 +0.37260986 P 13.9 From 221 observations 2006 Apr. 29-2020 Sept. 12, mean residual 0".6. P/2006 H1 (McNaught) Epoch 2020 May 31.0 TT = JDT 2459000.5 T 2019 Dec. 7.05386 TT Rudenko q 2.4227196 (2000.0) P Q n 0.07109945 Peri. 309.27946 +0.63167193 +0.77523570 a 5.7706565 Node 359.89143 -0.62538845 +0.50925419 e 0.5801657 Incl. 12.80487 -0.45812646 +0.37372421 P 13.9 From 221 observations 2006 Apr. 29-2020 Sept. 12, mean residual 0".6. Ephemeris: Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 2020 08 15 02 05 09.8 +17 30 36 2.7072 3.1575 107.1 17.9 19.2 ... 2020 08 30 02 05 26.8 +18 39 24 2.5910 3.2294 121.0 15.5 19.2 ... 2020 09 07 02 03 37.8 +19 06 33 2.5398 3.2682 128.9 13.9 19.2 ... 2020 09 13 02 01 23.9 +19 22 08 2.5080 3.2975 135.0 12.5 19.2 2020 09 14 02 00 57.5 +19 24 19 2.5033 3.3024 136.1 12.2 19.2 2020 09 15 02 00 29.9 +19 26 23 2.4989 3.3073 137.1 11.9 19.2 ... 2020 09 21 01 57 21.6 +19 36 11 2.4764 3.3369 143.4 10.3 19.2 ... 2020 09 29 01 52 18.3 +19 42 25 2.4591 3.3765 152.0 8.0 19.2 ... 2020 10 14 01 41 07.2 +19 34 27 2.4716 3.4513 167.1 3.7 19.3 (MPEC 2020-R15、CBET 4847)