○ 光度等観測報告 (2019年 10月) C/2017 B3 (LINEAR) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 4.57 13.9 0.5′ - >2.0′ 205° 3/5 3/5 45-cmC* 嶋邦博 ①② C/2017 T2 (PANSTARRS) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 4.73 12.6 1.8′ - - - - - EOS6D** 張替憲 ③④⑤ 4.76 12.8 0.8 - >7.0′ 240° 3/5 3/5 45-cmC* 嶋邦博 ①② 9.75 12.8 1.2 - 1.7 244 - - EOS6D** 張替憲 ③④⑥ C/2018 A3 (ATLAS) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 4.72 17.6 0.1′ - 　- - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2018 N2 (ASASSN) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 1.73 12.3 0.8′ - >8.0′ 175° 3/5 3/5 45-cmC* 嶋邦博 ①② 4.67 12.1 0.8 - >8.0 175 3/5 3/5 45-cmC* 嶋邦博 ①② 4.73 12.3 1.9 - 3.8 178 - - EOS6D** 張替憲 ③⑥⑦ 9.73 12.1 2.0 - 4.2 165 - - EOS6D** 張替憲 ③④⑦ C/2018 W2 (Africano) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 1.57 10.6 2.0′ - >6.0′ 40° 3/5 3/5 45-cmC* 嶋邦博 ①② 4.55 10.9 2.0 - >6.0 40 3/5 3/5 45-cmC* 嶋邦博 ①② C/2018 Y1 (Iwamoto) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 1.73 19.5 0.1′ - 　- - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2019 K4 (Ye) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 4.46 15.5 0.3′ - 　- - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2019 L2 (NEOWISE) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 1.73 19.5 0.1′ - 　- - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2019 L3 (ATLAS) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 4.52 17.4 0.1′ - 　- - 3/5 3/5 45-cmC* 嶋邦博 ①② 29P/Schwassmann-Wachmann 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 1.63 14.7 0.5′ - 　- - 3/5 3/5 45-cmC* 嶋邦博 ①② 4.64 15.0 0.5 - 　- - 2/5 2/5 45-cmC* 嶋邦博 ①② 65P/Gunn 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 4.71 19.4 0.1′ - 　- - 3/5 3/5 45-cmC* 嶋邦博 ①② 76P/West-Kohoutek-Ikemura 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 4.75 19.3 0.1′ - 0.2′ 275° 3/5 3/5 45-cmC* 嶋邦博 ①② 78P/Gehrels 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 4.78 15.8 0.1′ - 0.3′ 295° 3/5 3/5 45-cmC* 嶋邦博 ①② 114P/Wiseman-Skiff 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 1.75 17.8 0.1′ - 　- - 3/5 3/5 45-cmC* 嶋邦博 ①② 260P/McNaught 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 1.72 12.3 0.8′ - >10.0′ 240° 3/5 3/5 45-cmC* 嶋邦博 ①② 4.72 12.5 0.8 - <10.0 240 3/5 3/5 45-cmC* 嶋邦博 ①② 9.73 12.6 1.1 - 0.8 230 - - EOS6D** 張替憲 ③④⑧ 387P/Boattini 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 4.77 17.3 0.2′ - 0.4′ 300° 3/5 3/5 45-cmC* 嶋邦博 ①② 2I/Borisov 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 4.79 16.7 0.2′ - 0.6′ 315° 3/5 3/5 45-cmC* 嶋邦博 ①② (3200) Phaethon 2019 UT m2 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 1.74 16.8 - - 　- - 3/5 3/5 45-cmC* 嶋邦博 ①② 4.73 16.5 - - 　- - 3/5 3/5 45-cmC* 嶋邦博 ①② * 45-cm F12 (レデューサー使用 F4.6) カセグレン反射＋FLI ML8300。 ** 15-㎝ F4(レデューサ使用F2.5）反射＋デジタル一眼Canon EOS 6D。 ① 観測地:長野県富士見町 五藤光学八ヶ岳観測所。② 60秒露出をAstrometrica UCAC-4で測定。 ③ 15㎝F2.5反射+Canon EOS6DのG画像をGUIDE9.0を使用してMakali`i Ver1.4aにて測光。観測地 は千葉県九十九里海岸。④ 50秒露出(25秒×2) ⑤ 集光のあるコマから西南西に1.7分の尾が伸び ている。⑥ 48秒露出(24秒×2)　⑦ 集光のある円盤状のコマから南に約4分の尾が伸びている。 ⑧ 集光のあるコマから南西に幅広く短い尾が伸びている。 追加観測: C/2015 XY1 (Lemmon) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 29.71 18.5 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2016 A1 (PANSTARRS) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 29.64 18.4 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2017 B3 (LINEAR) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 26.48 14.3 0.3′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2017 K2 (PANSTARRS) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 31.38 16.4 0.2′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2017 T2 (PANSTARRS) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 29.76 11.9 0.8′ - >8.0′ 240° 3/5 3/5 45-cmC* 嶋邦博 ①② 30.77 11.8 1.0′ - >8.0′ 230° 3/5 3/5 45-cmC* 嶋邦博 ①② A/2017 U7 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 26.41 16.0 0.1′ - 0.5′ 95° 3/5 3/5 45-cmC* 嶋邦博 ①② C/2018 A3 (ATLAS) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 29.52 17.2 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 30.70 17.5 0.1′ - 0.8′ 40° 3/5 3/5 45-cmC* 嶋邦博 ①② 31.62 17.5 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2018 DO4 (Lemmon) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 26.73 15.6 0.1′ - 0.4′ 315° 3/5 3/5 45-cmC* 嶋邦博 ①② C/2018 L2 (ATLAS) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 30.69 18.9 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 31.66 19.0 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2018 N2 (ASASSN) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 26.57 12.1 0.8′ - >7.0 165° 3/5 3/5 45-cmC* 嶋邦博 ①② 29.49 12.2 0.8′ - >7.0′ 160° 3/5 3/5 45-cmC* 嶋邦博 ①② 30.65 12.0 1.0′ - >7.0′ 160° 3/5 3/5 45-cmC* 嶋邦博 ①② 31.56 12.1 1.0′ - >7.0′ 160° 3/5 3/5 45-cmC* 嶋邦博 ①② C/2018 W2 (Africano) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 26.43 13.0 0.3′ - >1.5′ 40° 3/5 3/5 45-cmC* 嶋邦博 ①② 31.44 12.7 0.3′ - >1.0′ 40° 3/5 3/5 45-cmC* 嶋邦博 ①② C/2018 Y1 (Iwamoto) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 29.52 19.2 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 30.66 20.0 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2019 K4 (Ye) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 26.50 18.5 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 29.56 18.4 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② C/2019 K5 (Young) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 25.76 17.4 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 29.68 17.4 0.1′ - 0.2′ 290° 3/5 3/5 45-cmC* 嶋邦博 ①② C/2019 K7 (Smith) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 26.42 16.7 0.1′ - 0.4′ 130° 3/5 3/5 45-cmC* 嶋邦博 ①② 31.43 16.7 0.1′ - 0.4′ 140° 3/5 3/5 45-cmC* 嶋邦博 ①② C/2019 N1 (ATLAS) 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 31.48 17.2 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② A/2019 Q1 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 29.62 19.5 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 2P/Encke 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 29.47 19.4 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 29P/Schwassmann-Wachmann 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 26.40 15.1 0.3′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 29.48 14.7 0.5′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 31.70 14.0 0.5′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 36P/Whipple 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 26.43 19.3 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 68P/Klemola 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 31.42 14.6 0.1′ - 0.7′ 95° 3/5 3/5 45-cmC* 嶋邦博 ①② 76P/West-Kohoutek-Ikemura 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 25.77 17.9 0.1′ - 0.5′ 240° 3/5 3/5 45-cmC* 嶋邦博 ①② 29.78 18.3 0.1′ - 0.5′ 260° 3/5 3/5 45-cmC* 嶋邦博 ①② 114P/Wiseman-Skiff 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 29.75 15.9 0.1′ - 0.8′ 210° 3/5 3/5 45-cmC* 嶋邦博 ①② 30.67 15.9 0.1′ - 0.8′ 205° 3/5 3/5 45-cmC* 嶋邦博 ①② 31.45 15.7 0.1′ - 0.8′ 205° 3/5 3/5 45-cmC* 嶋邦博 ①② 155P/Shoemaker 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 25.78 15.6 0.1′ - >3.0′ 280° 3/5 3/5 45-cmC* 嶋邦博 ①② 29.79 15.5 0.1′ - >3.0′ 280° 3/5 3/5 45-cmC* 嶋邦博 ①② 160P/LINEAR 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 31.44 14.9 0.1′ - 0.8′ 95° 3/5 3/5 45-cmC* 嶋邦博 ①② 203P/Korlevic 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 25.73 18.9 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 29.71 18.4 0.1′ - 0.2′ 260° 3/5 3/5 45-cmC* 嶋邦博 ①② 260P/McNaught 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 25.47 12.6 0.6′ - >8.0′ 235° 3/5 3/5 45-cmC* 嶋邦博 ①② 29.50 12.0 0.8′ - >8.0′ 230° 3/5 3/5 45-cmC* 嶋邦博 ①② 30.65 12.1 0.8′ - >8.0′ 230° 3/5 3/5 45-cmC* 嶋邦博 ①② 31.64 12.2 0.8′ - >8.0′ 230° 3/5 3/5 45-cmC* 嶋邦博 ①② 261P/Larson 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 29.69 17.1 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 30.76 17.0 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 31.69 17.3 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 384P/Kowalski 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 30.81 17.4 0.1′ - 1.5′ 280° 3/5 3/5 45-cmC* 嶋邦博 ①② 385P/Hill 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 31.67 19.5 0.1′ - - - 3/5 3/5 45-cmC* 嶋邦博 ①② 2I/Borisov 2019 UT m1 Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 29.79 16.1 0.1′ - 0.5′ 315° 3/5 3/5 45-cmC* 嶋邦博 ①② 30.79 16.2 0.1′ - 0.8′ 320° 3/5 3/5 45-cmC* 嶋邦博 ①② 31.79 16.5 0.1′ - 0.6′ 320° 3/5 3/5 45-cmC* 嶋邦博 ①② (3200) Phaethon 2019 UT m Dia DC Tail p.a. Trans. Seeing Instru. Observer Note Oct. 29.58 16.2 - - - - 3/5 3/5 45-cmC* 嶋邦博 ①② * 45-cm F12 (レデューサー使用 F4.6) カセグレン反射＋FLI ML8300。 ① 観測地:長野県富士見町 五藤光学八ヶ岳観測所。② 60秒露出をAstrometrica UCAC-4で測定。