Comet P/2006 S1 = 2019 M1 (Christensen) K. Sarneczky (Konkoly天文台)の通報によると、6月25.9日UT、Piszkesteto観測所の0.60-m Schmidt望遠鏡で得たフィルターなしのCCD画像からP/2006 S1 (IAUC 8749を)を検出した。4枚の積分 合計した120秒露出イメージは恒星状で、尾はなかった。6月26.9日、R. Konyves-TothとSarneczky が同じ望遠鏡で得た確認イメージでも、この彗星の頭部は恒星状で尾もなかった。 中野主一氏のNK 3215 (またはICQ Comet Handbook 2019)の予報に対し検出観測の残差は、赤経は -0.54°(-32'.4)、赤緯は-0.11°(-6'.6)で、Delta(T)は、+0.69 dayであった。 MPC 102108のB. G. Marsdenの予報に対するDelta(T)は、+0.71 dayであった。 検出位置は次のとおり、 2019 UT R.A. (2000) Decl. Mag. Observer June 25.89686 17 31 40.73 - 1 04 57.8 19.9 Sarneczky 25.90332 17 31 40.39 - 1 04 55.1 20.4 " 25.90978 17 31 39.97 - 1 04 51.6 " 26.89064 17 30 45.24 - 0 57 19.1 19.4 Konyves-Toth 26.89899 17 30 44.80 - 0 57 16.2 19.7 " 26.90734 17 30 44.28 - 0 57 12.2 20.0 " 27.92009 17 29 47.90 - 0 49 43.1 20.2 Sarneczky 27.92773 17 29 47.47 - 0 49 39.1 20.0 " 29.91714 17 27 57.74 - 0 35 46.1 20.6 " 29.92525 17 27 57.30 - 0 35 42.5 20.2 " 29.93337 17 27 56.82 - 0 35 39.8 " 連結軌道要素と位置推算表は次のとおり、 Orbital elements: P/2006 S1 (Christensen) Epoch 2006 Aug. 13.0 TT = JDT 2453960.5 T 2006 Aug. 30.18055 TT MPCLINUX q 1.3593200 (2000.0) P Q n 0.15075123 Peri. 128.04732 +0.94009680 +0.32129152 a 3.4964620 Node 213.65282 -0.33964831 +0.91143950 e 0.6112299 Incl. 11.86859 +0.02927514 +0.25700156 P 6.54 From 323 observations 2006 Aug. 23-2019 June 29, mean residual 0".7. P/2006 S1 (Christensen) Epoch 2013 Mar. 9.0 TT = JDT 2456360.5 T 2013 Mar. 17.31504 TT MPCLINUX q 1.3596229 (2000.0) P Q n 0.15082695 Peri. 128.29957 +0.94056168 +0.32004413 a 3.4952916 Node 213.47782 -0.33833582 +0.91208566 e 0.6110130 Incl. 11.88951 +0.02953983 +0.25626451 P 6.53 From 323 observations 2006 Aug. 23-2019 June 29, mean residual 0".7. P/2006 S1 (Christensen) Epoch 2019 Nov. 13.0 TT = JDT 2458800.5 T 2019 Oct. 26.20660 TT MPCLINUX q 1.4192131 (2000.0) P Q n 0.14779698 Peri. 133.61704 +0.94060360 +0.32448959 a 3.5429010 Node 207.89814 -0.33882522 +0.91582149 e 0.5994206 Incl. 12.32251 +0.02150223 +0.23659565 P 6.67 From 323 observations 2006 Aug. 23-2019 June 29, mean residual 0".7. P/2006 S1 (Christensen) Epoch 2026 July 19.0 TT = JDT 2461240.5 T 2026 July 2.59590 TT MPCLINUX q 1.4255256 (2000.0) P Q n 0.14738582 Peri. 133.73929 +0.94086339 +0.32382484 a 3.5494869 Node 207.81565 -0.33810710 +0.91610954 e 0.5983855 Incl. 12.32021 +0.02143988 +0.23639117 P 6.69 From 323 observations 2006 Aug. 23-2019 June 29, mean residual 0".7. P/2006 S1 (Christensen) Epoch 2019 Apr. 27.0 TT = JDT 2458600.5 T 2019 Oct. 26.18690 TT MPCLINUX q 1.4191505 (2000.0) P Q n 0.14769950 Peri. 133.60178 +0.94056971 +0.32457458 a 3.5444596 Node 207.90837 -0.33891812 +0.91578744 e 0.5996144 Incl. 12.32367 +0.02152029 +0.23661087 P 6.67 From 323 observations 2006 Aug. 23-2019 June 29, mean residual 0".7. Ephemeris: Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 2019 06 05 17 49 24.5 -04 31 15 1.0895 2.0618 157.0 11.1 21.3 ... 2019 06 20 17 37 09.0 -01 55 11 0.9815 1.9616 158.2 11.1 20.9 ... 2019 06 28 17 29 43.6 -00 49 03 0.9435 1.9092 153.8 13.6 20.7 ... 2019 07 04 17 24 19.8 -00 10 52 0.9235 1.8705 149.1 16.2 20.5 2019 07 05 17 23 28.4 -00 05 35 0.9208 1.8641 148.3 16.6 20.5 2019 07 06 17 22 38.0 -00 00 37 0.9182 1.8577 147.5 17.1 20.5 ... 2019 07 12 17 18 01.9 +00 22 20 0.9067 1.8199 142.2 20.0 20.4 ... 2019 07 20 17 13 25.5 +00 34 30 0.8994 1.7708 135.1 23.9 20.3 ... 2019 08 04 17 11 08.5 +00 03 49 0.9052 1.6835 122.4 30.6 20.0 (CBET 4649、MPEC 2019-N62)