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Lior Spiegel
June 28, 2021
post image

Contains: Deep sky object

Acquisition Details

Date Posted: June 28, 2021

Time: 04:00 PM

Equipment card


Rho Ophiuchi is a multiple star system in the constellation Ophiuchus. it is located about 360 light-years from us, other stars in the system are slightly farther away. This image has captured over 2 nights on Jun 10-11, 2021 from Negev desert Israel. The bright blue halo on the left side is from the star Sigma Scorpii, around this star there are multiple H- Alfa gas and dust which slightly shown in this image, I managed to capture 1 hour in HA filter but didn`t get enough data to my satisfaction. If you take a close look at this image you can see a dark nebula in a shape of a pigeon and a seahorse above the pigeon. Note that the first night was a bit windy and a bit cloudy but the second night was really come, the temp was steady all night, clear skies all night. The skies are Bortle 3. Image technical details, 2 nights imaging sessions: Lum- 60x120sec, bin 1x1 @ -10deg C` cooling. R- 19x300sec bin 1x1 @ -10deg C` cooling. G- 19x300sec bin 1x1 @ -10deg C` cooling. B- 19x300sec bin 1x1 @ -10deg C` cooling. Ha- 6x600sec bin 1x1 @ -10deg C` cooling. Total integration time for subs: 7h,45min. 100 Bias, 30 Flat, 20 dark, were added and combined for each filter. Slightly cropped- 2743x2184 res. Equipment details: Scope- Tak FSQ85EDX Mount- iOptron IEQ45 Pro. Camera- Starlight Xpress Trius SX694 mono & SX Filter Wheel. Filters- Astrodon 36mm unmounted E series Gen2 LRGB-Ha. Guider- SX Lodestar x2 & SX OAG. Power & data control: Pegasus UPBv2. Focus control: Pegasus stepper motor v2 kit. Software details: Camera & mount control- SGP via Ascom. Guiding- PHD2. Sky chart- SGP Frame and Mosaic tool. Mount main control- iOptron via Ascom. Registration, Calibration & stacking images- Maxim DL5 Processing- PS CS6.