大溪天文台觀測日誌:2018年03月30日大溪 晴有局部雲 月 初14
溫度: 19.3度c. 濕度70% 視狀 1/5 透明度 1/5
這個星期真是精采! 連看了兩顆新星!! 一顆是大犬座新星,另一顆是雙子座新星! 對於變星觀測者而言,真是幸運! so good luck!!
雙子座 脈動變星群 矮星新星TYPE 變星亮度爆發觀測
MEADE 10" SCT F/6.3 曝光 60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:
-------------------------------------------------------------------------------------------------------------
Name JD CalendarDate Mag Filter
-------------------------------------------------------------------------------------------------------------
T GEM 2458208.00347 2018 Mar 30.5035 8.6 V
U GEM 2458208.01042 2018 Mar 30.5104 9.5 V A dwarf nova (Brightness burst by now!)*V GEM 2458208.01389 2018 Mar 30.5139 12.9 V
Y GEM 2458208.02083 2018 Mar 30.5208 8.5 V
Z GEM 2458208.02778 2018 Mar 30.5278 11.7 V
---------------------------------------------------------------------------------------------------------------
10" SCT F/6.3 +ST2000XM 直焦點 溫度+0度C 曝光 60秒 JOHNSON V FILTER
AAVSO Observatory Code : TYGA TW (大溪天文台 台灣)
最低亮度取樣 14.71mag
----------------------------------------------------------------------------------------------------------------
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
*.U GEM 2458195.02778 2018 Mar 17.5278 13.9 V
GCVS U Gem=pec(UG)+M4.5V Mag. range:8.2 - 14.9 V A U Geminorum-type variable star, or dwarf nova ...but U gem the rising star outbreak after march 20....WOW!! 曹大貓咪
此變星是由兩顆恆星組成雙星系統,一顆是白矮星和紅矮星,又稱為矮星新星(dwarf nova).兩顆星的公轉週期為4小時11分鐘左右.光度由14-15.1等範圍變化.會暴亮約100天的周期,會亮到約9等亮度!但週期並非穩定,也許最短約62天到257天間... 老貓觀測它在3月10日(14.3等)和3月17日(13.9等) 現階段為穩定期.卻在3月20日後爆發,在30日觀測時,亮度已經達到+9.5等! 現階段可能已經達到最亮時期.粉幸運能觀測到此新星爆發.
The binary star system consists of a white dwarf and a Red Dwarf. These two components orbit in 4 hours and 11 minutes. This results in a change of light between 14.0 and 15.1 mag, which is mainly a result of normally .
During an outbreak of brightness, which occurs on average every 100 days, can the apparent magnitude up to 9 may increase. The cycle is highly irregular, so the shortest period between two eruptions was 62 days, however, he had to wait longest 257 days.
https://de.m.wikipedia.org/wiki/U_Geminorum