Please help with hd 189733 b !
Hi, I hope someone please can help me.
The other night, for the 12492394234 time, I tried to detect the transit of hd 189733 b, the easiest transit.
I used a pentacon 200 mm f2.8 of 50mm of aperture, cmos camera zwo asi 120 MM of 12 bits, a skywatcher eq3-2 mount and later the astroimageJ program to process the data.
i started recording at 1.20 (10 min before the beginning of the transit) and stopped at 3.40 (20 min after the end), because where I live is UTC+2, according to the E
Your target and some of reference stars are saturated in this 16 bit image (several pixels with 65520 values). I also told you earlier that you had saturated stars in your 8 bit images (several pixels with 255 values).
The exposure you need will vary from night to night depending on atmospheric conditions and will also vary through the night as the star changes in height above the horizon. I recommend checking some images before you start a run and adjusting your exposure to limit the