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                WHIRLPOOL GALAXY 

                       (旋渦星系)M51

 

 

OBJECT INFO (圖片資料)
Name of Object (名稱) Whirlpool Galaxy(旋渦星系) M51 or NGC 5194
Constellation/Celestrial Location (天球位置) Canes Vanetici Constellation (獵犬座)
Distance from Earth (距離地球) 30 million light years away
Angular Dimension of Picture (圖片視角 31.5 x 23.5 arc min
Angular (Actual) Size of Object(物件視角大小) 11 x 7 arc min (60,000 light years across)
Resolution (圖片像) Cropped to  960 x 800 pixels 
CAPTURE DATE/ LOCATION(拍攝時/地)
Captured Date (拍攝日期) March 2013
Location (地點) Remote Telescope Observatory, Sai Kung, New Territories, Hong Kong
Altitude (海拔) 10 metres
Near Eye Limiting Visual Magnitude (目視星等) 5.0 - 5.5 
IMAGING SCOPE/LENS (拍攝鏡)
Imaging Scope (主鏡 TEC 140mm + Field Flattener
Focal Length() 980mm
Effective Focal Ratio (有效焦比) F 7.0
Filter Wheel (濾鏡) Finger Lake 7 x 50mm Filter Wheel
Filter(s) (濾鏡) Baader L filter  only
RECORDING DEVICE(影像記錄儀器)
Recording Device (机身) Atik 314L (Sony ICX285 mono chip) 1.4M pixel cooled CCD
Image Scale (解像度) 1.357 arc sec per pixel
Device Temperture (机身氣溫) 0.0 C
Exposure (曝光) Total Luminance  Exposure  6 hrs in 4 days by remote operation
MOUNT/TRACKING(追踪器材)
Mount (赤導儀) EQ6 Pro
Guide Scope (導星鏡) Starlight Xpress Slim Off-Axis Guider
Auto Guider (導星儀器) Starlight Xpress Lodestar (Sony ICX429 mono chip) 
Guiding Software(導星軟件) PHD Guiding
Guiding parameters (導星參數) 2 sec exposure
Adaptive Optics (主動光學參數) N. A.
EQUIPMENT SETUP (整套儀器)
Feedbacks & Comments (回應及意見)
PREVIOUS ATTEMPT(S) ON SAME OBJECT (以前之拍攝) 2006

 

 

 

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