Comet P/2001 R6 = 2018 R1 (LINEAR-Skiff) E. Schwab (Egelsbach, ドイツ)の通報によると、9月7-8日UT、D. AbreuがスペインのTenerife にあるESA(欧州宇宙機関)の光学地上局の1.0-m f/4.4 反射望遠鏡で得た画像からP/2001 R6 (IAUC 7723を参照)を検出した。露出合計600秒スタックのイメージにコマ、尾ともになかった。 測定の補助には、M. Micheli, D. Koschny, A. Knoefelと M. Buschがあたった。 MPEC 2013-A29のG. V. Williamsの予報に対して、Delta(T)は、+0.36 dayであった。 検出位置は次のとおり、 2018 UT R.A. (2000) Decl. Mag. Observer Sept. 7.08501 2 08 16.55 -13 25 56.0 19.8 Abreu 7.14283 2 08 16.67 -13 26 02.4 19.8 " 7.20030 2 08 16.83 -13 26 08.6 19.9 " 8.11194 2 08 20.48 -13 27 49.1 19.1 " 8.21684 2 08 20.60 -13 28 00.4 20.0 " 連結軌道要素と位置推算表は次のとおり、 Orbital elements: P/2001 R6 (LINEAR-Skiff) Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 T 2001 Oct. 27.09619 TT MPCW q 2.1150912 (2000.0) P Q n 0.11808859 Peri. 306.19393 +0.92418541 -0.25899768 a 4.1146297 Node 70.32204 +0.36786519 +0.80130246 e 0.4859583 Incl. 17.34512 -0.10274495 +0.53929081 P 8.35 >From 95 observations 2001 Aug. 19-2018 Sept. 8, mean residual 0".6. P/2001 R6 (LINEAR-Skiff) Epoch 2010 Mar. 25.0 TT = JDT 2455280.5 T 2010 Mar. 26.34015 TT MPCW q 2.1786419 (2000.0) P Q n 0.11569441 Peri. 308.45182 +0.92932023 -0.24564787 a 4.1712010 Node 67.32340 +0.35517269 +0.79895963 e 0.4776943 Incl. 17.38669 -0.10107560 +0.54892680 P 8.52 From 95 observations 2001 Aug. 19-2018 Sept. 8, mean residual 0".6. P/2001 R6 (LINEAR-Skiff) Epoch 2018 Oct. 9.0 TT = JDT 2458400.5 T 2018 Oct. 4.58710 TT MPCW q 2.1910673 (2000.0) P Q n 0.11528544 Peri. 308.47883 +0.92917375 -0.24629692 a 4.1810600 Node 67.33485 +0.35567271 +0.79878420 e 0.4759541 Incl. 17.37964 -0.10066311 +0.54889127 P 8.55 From 95 observations 2001 Aug. 19-2018 Sept. 8, mean residual 0".6. P/2001 R6 (LINEAR-Skiff) Epoch 2027 Apr. 25.0 TT = JDT 2461520.5 T 2027 Apr. 26.11920 TT MPCW q 2.1894223 (2000.0) P Q n 0.11535065 Peri. 308.61323 +0.92918463 -0.24642222 a 4.1794841 Node 67.21225 +0.35576427 +0.79839965 e 0.4761501 Incl. 17.38604 -0.10023827 +0.54939429 P 8.54 From 95 observations 2001 Aug. 19-2018 Sept. 8, mean residual 0".6. P/2001 R6 (LINEAR-Skiff) Epoch 2018 Mar. 23.0 TT = JDT 2458200.5 T 2018 Oct. 4.60963 TT MPCW q 2.1910458 (2000.0) P Q n 0.11534670 Peri. 308.48446 +0.92914521 -0.24640143 a 4.1795797 Node 67.33565 +0.35576375 +0.79874564 e 0.4757736 Incl. 17.37972 -0.10060482 +0.54890047 P 8.54 From 95 observations 2001 Aug. 19-2018 Sept. 8, mean residual 0".6. Ephemeris: P/2001 R6 (LINEAR-Skiff) Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 2018 08 09 01 53 27.9 -12 47 25 1.6418 2.2372 112.6 24.7 20.6 ... 2018 08 24 02 04 02.7 -13 01 16 1.4968 2.2162 123.0 22.5 20.3 ... 2018 09 01 02 07 11.1 -13 14 37 1.4292 2.2075 128.9 20.8 20.2 ... 2018 09 07 02 08 15.9 -13 25 42 1.3837 2.2022 133.5 19.4 20.1 2018 09 08 02 08 20.0 -13 27 32 1.3766 2.2014 134.2 19.1 20.1 2018 09 09 02 08 22.3 -13 29 21 1.3697 2.2006 135.0 18.9 20.1 ... 2018 09 15 02 07 55.7 -13 39 22 1.3313 2.1967 139.7 17.2 20.0 ... 2018 09 23 02 05 36.6 -13 48 10 1.2894 2.1930 145.8 14.9 20.0 ... 2018 10 08 01 56 41.7 -13 37 19 1.2442 2.1912 155.1 11.1 19.9 (CBET 4552、MPEC 2018-R59)