大溪天文台觀測日誌:2020年01月03 04日大溪 晴 吹西南風 高空捲雲
溫度:20.6-16.1 度C 濕度:70%-86% 視狀 2/5 透明度 2-3/5 (1-5 最差到最佳程度)
觀測變星: 24顆 CCD:22顆 目視:2顆 碣虎座GCVS LAC 獵戶座 GCVS ORI 雙子座 GCVS GEM 天鵝座 GCVS CYG
MEADE 10" SCT F/6.3 曝光 60-90秒 SBIG ST2000XM V FILTER 自由追蹤 (POLEMASTER 2017 0805 校對) Showa 20E kai +Vixen Skysensor 2000PC +TheSky GOTO system
Observations submitted since last login:
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Name JD CalendarDate Mag Filter a b inst SQM
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R LAC 2458851.94792 2020 Jan 3.4479 14.4 V 17.68
S LAC 2458851.95139 2020 Jan 3.4514 12.5 V 17.56
T LAC 2458851.95486 2020 Jan 3.4549 9.1 V 17.58
U LAC 2458851.95833 2020 Jan 3.4583 9.4 V 17.57
V LAC 2458851.96181 2020 Jan 3.4618 8.5 V 17.55
W LAC 2458851.96528 2020 Jan 3.4653 10.0 V 17.64
X LAC 2458851.96875 2020 Jan 3.4688 8.6 V 17.62
Y LAC 2458851.97222 2020 Jan 3.4722 9.2 V 17.56
Z LAC 2458851.97569 2020 Jan 3.4757 8.2 V 17.60
BETELGEUSE 2458851.97569 2020 Jan 3.4757 1.1 Vis. 0.15 1.6 NAKED EYES 18.35R ORI 2458851.97569 2020 Jan 3.4757 10.3 V 18.42
S ORI 2458851.98264 2020 Jan 3.4826 11.2 V 18.41
U ORI 2458851.98958 2020 Jan 3.4896 12.4 V 18.51
V ORI 2458851.99167 2020 Jan 3.4917 11.4 V 18.62
X ORI 2458851.99861 2020 Jan 3.4986 15.3 V 18.63
Y ORI 2458852.16667 2020 Jan 3.6667 14.1 V 18.57
Z ORI 2458852.17361 2020 Jan 3.6736 9.1 V 18.52
R GEM 2458853.13889 2020 Jan 4.6389 10.8 V 18.28
S GEM 2458853.14236 2020 Jan 4.6424 10.9 V 18.45
T GEM 2458853.14931 2020 Jan 4.6493 9.5 V 18.53
R CYG 2458852.92014 2020 Jan 4.4201 11.9 V 16.96
T CYG 2458852.92708 2020 Jan 4.4271 5.2 Vis. 4.53 5.47 8X30 BINOCULARS FOV 8.3d 17.13
U CYG 2458852.92917 2020 Jan 4.4292 9.7 V 17.22
Y CYG 2458852.93403 2020 Jan 4.4340 7.7 V 17.27
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10" SCT F/6.3 +ST2000XM 直焦點 溫度+0度C 曝光 60-70秒 JOHNSON V FILTER
AAVSO Observatory Code : TYGA TW (大溪天文台 台灣)
當晚極限星等 取樣 01/03:15.33mag 01/04:14.90mag
大溪及世界各地業餘觀測者的觀測資料及曲線可參考 http://www.aavso.org/data/lcg
*.Vmag=photometry RADEC=astrometry by Astroart5.0
C/2017 T2 已進入彗尾長達15' .彗核明亮期!
Comet list:
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name DATE TIME (UT) RA DEC mag (m1) SQM 彗髮直徑 彗尾長度
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2017 T2 20200103 12h40m 03h17m40.46s +55d35'23.51" 9.9 (visual) 17.76 約 2.0' 約 15'
2017 T2 20200104 11h30m 03h14m50s +55d43'13" 10.1-10.0 17.35 ------ ------
2018 N2 20200103 13h48m 23h29m28.58s +39d50'55.9" 13.1 (photometry) 17.93 ------ ------
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*.2017 T2 預計到明年5,6月達到8等。2020 0103/04 兩個晚上觀測T2 採用 10"鏡 112x(fov=0.62度) ,確認T2彗星彗核明亮 彗尾稍有彎曲 .目視觀測亮度 03日為9.9等.但04日視狀較差,觀測亮度為 10-10.1等.現在大溪天文台會持續觀測....
*.2018 N2 03日測光約在13.1等(T2光度修正數值 -4.1 N2 光度修正數值 -2.7 04日測光約 14.2 mag 因四日取樣較差則不採用)
*.彗星定位(astrometry) 光度光電測定 (photometry) 皆採用 astroart 5.0 測定及數據參數計算.
大溪天文台彗星觀測,自2017年加入德國天文彗星觀測組職,2018年2月開始不定期將彗星目視光度觀測及影像報告傳送此組職
http://fg-kometen.vdsastro.de/fgk_hpe.htm de TYGA TW 2020 01 09