บทความภาพถ่ายดาราศาสตร์ (Astrophotography Knowledge)
ภาพถ่ายดาราศาสตร์ RIMA HADLEY Apollo 15 landing site
ภาพถ่ายดาราศาสตร์ RIMA HADLEY Apollo-15 landing site เป็นภาพถ่ายพื้นผิวดวงจันทร์บนส่วนใกล้โลก ถ่ายโดยกล้อง Meade Light Bridge 16” โดยไม่ใช้ระบบตามดาวอัตโนมัติ
RIMA HADLEY
by Cherdphong V. (Tony)
03/06/2017 19:52 UT Prawet,Bangkok,Thailand, Meade Light Bridge 16”, Equatorial Platform (Tom),
Televue Powermate 5x @f/22.5, Effective Focal Length of 9,145 mm ASI 174MM-Cool, ROI 1936×1216, Gain 164
@128 fps,Best 100 frames from 7,702 frames, AS! 2,Registax 6, PS 7
Seeing the photo of RIMA HADLEY Apollo 15 landing site, the condition is good. However, a lots of turbulence was found. Meade Light Bridge 16″ with 5x Televue Powermate can be operated on Equatorial Platform (Tom). With region of interest (ROI) at 1936×1216 pixel, the platform can track the image very steady. Only a slightly adjust to be corrected. No auto guide system is used. ASI 174MM-Cool can perform a very low noise with extremely high rates of 128 frame per seconds. Nearly full of traffic by USB3. Then the image was processed by Auto Stakkert 2. Just only 100 images were selected from total of 7,702 capture frames. For more image details, wavelet function in Registax 6 was applied. Finally, image contrast, level and caption were done by Photoshop7.
Where is Rima Hadley and why?
The Apollo 15 landing site is on the northern of Montes Apenninus, the vertically aligned mountain of images. Further notice on Hadley Rille, it is a canal like from south to north. The most top of Hadley Rille is Rima Hadley, east to west direction. Apollo 15 has landed on further north between Rima Hadley and Mons Hadley.
Rima Hadley typically ranges in depth between 600 and 900 feet (180 and 270 m), but is approximately 1,200 feet (370 m) deep at the Apollo 15 landing site. The feature has a cumulative length of about 80 miles (130 km).
https://en.m.wikipedia.org/wiki/Hadley–Apennine#
http://www.lpi.usra.edu/lunar/missions/apollo/apollo_15/landing_site/
