Equipment: Zeiss ApoSonnar 135mmF2, IDAS Clear Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 13 times x 600 seconds, 12 x 240 sec, and 10 x 60 seconds at ISO 1,600 and f/3.2

I put 60-second frame and 240-second frame on starless frame.

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

In this wide field view of the heavens you can see the head of Scorpius, a region full of complex dust and nebulae.

The bright "star" in the middle of the image is Mars. Zoomed in, you can notice it has moved and left a trail during this 90 minute exposure.

Made up of 30 x 3 minute exposures, shot at 144mm using the Canon 6D and 70-200mm f/4L IS lens. ISO3200. Taken at Bretti, NSW, Australia on the 23rd September 2014.

Follow me on Youtube www.youtube.com/user/JasonAnthonyDJ/

I like this framing of summer southern milkyway.

equipment: Sigma 40mmF1.4 Art and EOS 6D-SP4, modified by Seo-san on ZWO AM5 equatorial mount on the genuine tripod with counter weight 4.8kg, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, ZWO ASI 120MM-mini, and PHD2 Guiding

exposure: 8 times x 900 seconds, 3 x 240 sec, 4 x 60 seconds at ISO 1,600 and f/3.2

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was around 10 degrees Celsius or 34 degrees Fahrenheit. Wind was mild. Sky was dark, and SQML reached 21.83 at the night.

equipmnent: Sigma 40mmF1.4 DG HSM Art and Canon EOS 6D-sp4, modified by Seo-san on Takahashi EM-200FG-Temma 2Z-BL, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, Starlight Xpress Lodestar Autoguider, and PHD2 Guiding

exposure: 9 times x 15 minutes, 5 x 4 min, 5 x 1 minute at ISO 1,600 and f/4.0

site: 2,430m above sea level at lat. 24 39 52 South and long. 70 16 11 West near Cerro Armazones Chile

equipmnent: Sigma 28mmF1.4 DG HSM Art and Canon EOS 5Dmk2-sp2, modified by Seo-san on Takahashi EM-200FG-Temma 2Z-BL, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, Starlight Xpress Lodestar Autoguider, and PHD2 Guiding

exposure: 6 times x 15 minutes, 4 x 4 min, 8 x 1 minute at ISO 1,600 and f/3.5

site: 2,430m above sea level at lat. 24 39 52 South and long. 70 16 11 West near Cerro Armazones Chile

Atacama Desert just before Sunset July 2019

www.flickr.com/photos/hiroc/48588682472

Equipment: Sigma 35mmF1.4 Art, IDAS NB12 Dual Narrowband Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 11 times x 1,200 seconds,8 x 240 sec, and 17 x 60 seconds at ISO 6,400 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

The shape of Gegenschein looked not round but irregular.

Equipment: Sigma 35mmF1.4 Art, IDAS Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 10 times x 600 seconds, 9 x 240 sec, and 10 x 60 seconds at ISO 1,600 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Zeiss ApoSonnar 135mmF2, IDAS Clear Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 18 times x 600 seconds, 12 x 240 sec, and 13 x 60 seconds at ISO 1,600 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Zeiss ApoSonnar 135mmF2, IDAS NB12 Dual Narrowband Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 11 times x 1,200 seconds, 12 x 240 sec, and 16 x 60 seconds at ISO 6,400 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

equipmnent: Sigma 105mmF1.4 DG HSM Art and Canon EOS 6D-sp4, modified by Seo-san on Takahashi EM-200FG-Temma 2Z-BL, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, Starlight Xpress Lodestar Autoguider, and PHD2 Guiding

exposure: 7 times x 15 minutes, 4 x 4 min, and 4 x 1 minute at ISO 1,600 and f/3.2

site: 2,430m above sea level at lat. 24 39 52 South and long. 70 16 11 West near Cerro Armazones Chile

i could enjoy imaging of the object during the residual time at the last night in Atacama Desert Chile. Ring-shaped vast hydrogen-alpha emission was clear near the center like Flag of Turkey.

Equipment: Sigma 35mmF1.4 DG HSM Art, IDAS NB12 Dual Narrow Band Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 4 times x 60 seconds, 3 x 240 sec, and 4 times x 1,080 seconds at ISO 6,400 and f/3.2

site: 2,430m above sea level at lat. 24 38 55 South and long. 70 16 52 West near Cerro Armazones Chile

SQML was 21.55 at the night. Ambient temperature was around 6 degrees Celsius or 43 degrees Fahrenheit.

Jupiter was in Scorpius then and bright in the left half on the frame. Zodiacal light was crossing obliquely near the center of the frame.

Here is a bit closer frame of the area, taken with 105mm lens.

www.flickr.com/photos/hiroc/48645263811

equipmnent: Sigma 40mmF1.4 DG HSM Art and Canon EOS 6D-sp4, modified by Seo-san on Takahashi EM-200FG-Temma 2Z-BL, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, Starlight Xpress Lodestar Autoguider, and PHD2 Guiding

exposure: 10 times x 15 minutes, 8 x 4 min, 4 x 1 minute at ISO 1,600 and f/4.0

site: 2,430m above sea level at lat. 24 39 52 South and long. 70 16 11 West near Cerro Armazones Chile

Equipment: Zeiss ApoSonnar 135mmF2, IDAS NB12 Dual Narrowband Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 11 times x 1,200 seconds, 12 x 240 sec, and 16 x 60 seconds at ISO 6,400 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Sigma 35mmF1.4 Art, IDAS NB12 Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 12 times x 600 seconds, 10 x 240 sec, and 9 x 60 seconds at ISO 1,600 and f/3.2 with Clear Filter

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Zeiss ApoSonnar 135mmF2, IDAS Clear Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 18 times x 600 seconds, 12 x 240 sec, and 13 x 60 seconds at ISO 1,600 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

There encroached satellites, aircrafts, and laser beams from Paranal observatory nearby, and I have excluded data containing them.

Here is a frame of the area taken with dual narrow band filter in 2024: www.flickr.com/photos/hiroc/53774987381

equipment: Sigma 105mmF1.4 Art and EOS 6D-SP4, modified by Seo-san on ZWO AM5 equatorial mount on the genuine tripod with counter weight 4.8kg, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, ZWO ASI 120MM-mini, and PHD2 Guiding

exposure: 4 times x 900 seconds, 2 x 240 sec, 6 x 60 seconds at ISO 1,600 and f/3.2

site: 2,434m above sea level at lat. 24 39 52 south and long. 70 16 11 west near Cerro Armazones in Sierra Vicuña Mackenna in Coast Range of Chile

Ambient temperature was around 10 degrees Celsius or 34 degrees Fahrenheit. Wind was mild. Sky was dark, and SQML reached 21.83 at the night.

Equipment: Zeiss ApoSonnar 135mmF2, IDAS NB12 Dual Narrowband Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,200 seconds, 13 x 240 sec, and 14 x 60 seconds at ISO 6,400 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

i could enjoy imaging of the object during the residual time at the last night in Atacama Desert Chile. Ring-shaped vast hydrogen-alpha emission was clear near the center like Flag of Turkey.

Equipment: Sigma 35mmF1.4 DG HSM Art, IDAS NB12 Dual Narrow Band Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 4 times x 60 seconds, 3 x 240 sec, and 4 times x 1,080 seconds at ISO 6,400 and f/3.2

site: 2,430m above sea level at lat. 24 38 55 South and long. 70 16 52 West near Cerro Armazones Chile

SQML was 21.55 at the night. Ambient temperature was around 6 degrees Celsius or 43 degrees Fahrenheit.

We can see wider extent of hydrogen-alpha emissions with narrow band filter, though the colorful area turned less colored.

Equipment: Sigma 105mmF1.4 DG HSM Art, IDAS NB12 Dual Narrow Band Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5 Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 120MM-mini, and PHD2 Guiding

Exposure: 4 times x 60 seconds, 3 x 240 sec, and 2 times x 1,080 seconds at ISO 6,400 and f/3.2

site: 2,430m above sea level at lat. 24 38 55 South and long. 70 16 52 West near Cerro Armazones Chile

SQML was 21.55 at the night. Ambient temperature was around 6 degrees Celsius or 43 degrees Fahrenheit.

Equipment: Sigma 35mmF1.4 Art, IDAS NB12 Dual Narrowband Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 11 times x 1,200 seconds,8 x 240 sec, and 17 x 60 seconds at ISO 6,400 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Sigma 35mmF1.4 Art, IDAS NB12 Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 12 times x 600 seconds, 10 x 240 sec, and 9 x 60 seconds at ISO 1,600 and f/3.2 with Clear Filter

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Zeiss ApoSonnar 135mmF2, IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 11 times x 1,200 seconds, 12 x 240 sec, and 16 x 60 seconds at ISO 6,400 and f/3.2 at Dual Narrowband Filter and 13 times x 600 seconds, 12 x 240 sec, and 10 x 60 seconds at ISO 1,600 and f/3.2 with Clear Filter

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

I intended to optimize the frame at the center part, and the result got somehow orthodox or rather old fashioned frame.

"Supergiant Atmosphere of Antares Revealed by Radio Telescopes"

public.nrao.edu/news/supergiant-atmosphere-of-antares-rev...

Equipment: Zeiss ApoSonnar 135mmF2, IDAS Clear Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 13 times x 600 seconds, 12 x 240 sec, and 10 x 60 seconds at ISO 1,600 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Zeiss ApoSonnar 135mmF2, IDAS Clear Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 18 times x 600 seconds, 12 x 240 sec, and 13 x 60 seconds at ISO 1,600 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

This is the final version of the series.

Equipment: Zeiss ApoSonnar 135mmF2, IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 11 times x 1,200 seconds, 12 x 240 sec, and 16 x 60 seconds at ISO 6,400 and f/3.2 at Dual Narrowband Filter and 13 times x 600 seconds, 12 x 240 sec, and 10 x 60 seconds at ISO 1,600 and f/3.2 with Clear Filter

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Sigma 35mmF1.4 Art, IDAS NB12 Dual Narrowband Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 7 times x 1,200 seconds, 8 x 240 sec, and 10 x 60 seconds at ISO 6,400 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

The shape of Gegenschein looked not round but irregular.

Equipment: Sigma 35mmF1.4 Art, IDAS Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 10 times x 600 seconds, 9 x 240 sec, and 10 x 60 seconds at ISO 1,600 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

A two panel wide-field mosaic of the Blue Horsehead Nebula (IC 4592), a faint reflection nebula in the constellation Scorpius. The nebula is lit by the multiple Star System Nu Scorpii.

Gear:

William Optics Star 71mm f/4.9 Imaging APO Refractor Telescope.

QHY163M Sensor cooled to -20°C.

Technical Card:

Integration Time: 24 hours total (12 hours / panel)

L = 6 hours / panel (Binning 1x1)

R = 2 hours / panel (Binning 2x2)

G = 2 hours / panel (Binning 2x2)

B = 2 hours / panel (Binning 2x2)

Calibration frames:

Bias, Darks & Flats.

Image Acquisition:

Guiding in Open PHD.

Image acquisition in Sequence Generator Pro.

Plate Solving in Platesolve 2 via SGP Framing & Mosaic Wizzard.

Processing:

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Martin

-

Original image:

www.flickr.com/photos/martin_heigan/49429708568

This is the final version of the series. I could enjoy all process of astroimaging.

Equipment: Zeiss ApoSonnar 135mmF2, IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,200 seconds, 13 x 240 sec, and 14 x 60 seconds at ISO 6,400 and f/3.2 with Dual Narrowband Filter and 18 times x 600 seconds, 12 x 240 sec, and 13 x 60 seconds at ISO 1,600 and f/3.2 with Clear Filter

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

The shape of Gegenschein looked not round but irregular.

Equipment: Sigma 35mmF1.4 Art, IDAS Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 10 times x 600 seconds, 9 x 240 sec, and 10 x 60 seconds at ISO 1,600 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Sigma 35mmF1.4 Art, IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 7 times x 1,200 seconds, 8 x 240 sec, and 10 x 60 seconds at ISO 6,400 and f/3.2 with Dual Narrowband Filter and 10 times x 600 seconds, 9 x 240 sec, and 10 x 60 seconds at ISO 1,600 and f/3.2 with Clear Filter

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Zeiss ApoSonnar 135mmF2, IDAS NB12 Dual Narrowband Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,200 seconds, 13 x 240 sec, and 14 x 60 seconds at ISO 6,400 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

A wide-field DSLR Lens image of the Blue Horsehead Nebula (IC 4592), a very faint reflection nebula in the constellation Scorpius. The nebula is lit by the multiple Star System Nu Scorpii.

Gear:

Nikon AF-S VR Micro-Nikkor 105mm f/2.8G IF-ED (N Series Lens).

Cyclops Optics BLADE-N Camera Lens Adapter.

Celestron SkySync GPS Accessory.

Orion Mini 50mm Guide Scope.

Orion StarShoot Autoguider.

Celestron AVX Mount.

QHYCCD PoleMaster.

Celestron StarSense.

Optolong L-Pro & RGB filters.

QHYCFW2-M-US Filterwheel (7 position x 36mm).

QHY163M Cooled CMOS Monochrome Astronomy Camera.

Tech:

Guiding in Open PHD 2.6.5.

Image acquisition in Sequence Generator Pro.

Lights/Subs:

Lens stopped down to f/4.

Imaged at -20°C

QHY Sensor Sensitivity:

Gain: 120

Offset: 60

Imaged in LRGB:

L = 24 x 300 sec.

R = 18 x 300 sec.

G = 18 x 300 sec.

B = 18 x 300 sec.

Calibration Frames:

50 x Bias/Offset.

24 x Darks.

Image Acquisition:

Sequence Generator Pro.

Processing:

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

Astrometry Info:

Center RA, Dec: 244.079, -19.356

Center RA, hms: 16h 16m 19.061s

Center Dec, dms: -19° 21' 20.221"

Size: 3.24 x 3.94 deg

Radius: 2.551 deg

Pixel scale: 8.87 arcsec/pixel

Orientation: Up is 209 degrees E of N

View an Annotated Sky Chart for this image.

View this image in the WorldWideTelescope.

Martin

-

www.flickr.com/photos/martin_heigan

This is the final version of the series.

Equipment: Sigma 35mmF1.4 Art, IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 7 times x 1,200 seconds, 8 x 240 sec, and 10 x 60 seconds at ISO 6,400 and f/3.2 with Dual Narrowband Filter and 10 times x 600 seconds, 9 x 240 sec, and 10 x 60 seconds at ISO 1,600 and f/3.2 with Clear Filter

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Sigma 35mmF1.4 Art, IDAS NB12 Clear Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 12 times x 600 seconds, 10 x 240 sec, and 9 x 60 seconds at ISO 1,600 and f/3.2 with Clear Filter

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Zeiss ApoSonnar 135mmF2, IDAS NB12 Dual Narrowband Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,200 seconds, 13 x 240 sec, and 14 x 60 seconds at ISO 6,400 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

IC4592; IC4601; Blue Horsehead Nebula wide field and Ceres(dwarf planet)

Equipment: Sigma 35mmF1.4 Art, IDAS NB12 Dual Narrowband Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 11 times x 1,200 seconds,8 x 240 sec, and 17 x 60 seconds at ISO 6,400 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Zeiss ApoSonnar 135mmF2, IDAS NB12 Dual Narrowband Filter or Clear Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 9 times x 1,200 seconds, 13 x 240 sec, and 14 x 60 seconds at ISO 6,400 and f/3.2 with Dual Narrowband Filter and 18 times x 600 seconds, 12 x 240 sec, and 13 x 60 seconds at ISO 1,600 and f/3.2 with Clear Filter

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Equipment: Sigma 35mmF1.4 Art, IDAS NB12 Dual Narrowband Filter, and EOS R6-SP5, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 11 times x 1,200 seconds,8 x 240 sec, and 17 x 60 seconds at ISO 6,400 and f/3.2

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

🌌 The Blue Horsehead Nebula - IC 4592 🌌

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This mesmerizing image showcases the Blue Horsehead Nebula, a stunning reflection nebula in the constellation Scorpius. The ethereal glow comes from starlight scattered by interstellar dust, creating the silhouette of a majestic blue horse against the cosmic backdrop.

🔭 Target: IC 4592

🌟 Type: Reflection Nebula

📍 Location: Constellation Scorpius, approximately 400 light-years away

✨ Apparent Magnitude: ~4.8

📐 Apparent Size: ~1.5 degrees

About the Region:

The nebula's distinctive blue hue is a result of scattered light from the nearby bright star Nu Scorpii. The intricate interplay of light and dust creates an illusion of depth and motion, making it a favorite subject for astrophotographers.

🎨 Processing Details:

Captured with meticulous attention to detail, the image emphasizes the delicate structures of the nebula while preserving the natural colors of the surrounding interstellar medium.

Lights: 123x300" (RGB)

Instruments: Telescope Meade 70mm APO, Camera QHY600C

#IC4592 #BlueHorseheadNebula #Astrophotography #ReflectionNebula #DeepSky

Equipment: Zeiss ApoSonnar 135mmF2, IDAS NB12 Dual Narrowband Filter, and EOS R-SP4II, modified by Seo San on ZWO AM5n Equatorial Mount, autoguided with Fujinon 1:2.8/75mm C-Mount Lens, Pentax x2 Extender, ZWO ASI 174MM-mini, and PHD2 Guiding

Exposure: 11 times x 1,200 seconds, 12 x 240 sec, and 16 x 60 seconds at ISO 6,400 and f/3.2

I put 60-second frame and 240-second frame on starless frame.

site: 2,560m above sea level at lat. 24 23 21 South and long. 70 12 01 West near the peak of Cerro Ventarrones Chile

Ambient temperature was 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.77 at the night.

Galactic Core Jewels

Nikon D810

Sigma Art 40mm. F/1.4

100x240" - 6hrs 40'

Fornax Lightrack II

#galacticcore #milkyway #galacticcoregalaxy #scorpius #rhoophiuchi #antares #bluehorseheadnebula #lagoonnebula #milkywaychasers #astrophotography #astrophotographer #nikond810 #nikonmea #nikon #waddahphotography #waddah #sigma #fornaxmounts

藍馬頭星雲

IC 4592

Blue Horsehead Nebula

IC 4601

其實從大一寒假

用改機相機拍了廣角的調色盤後

就一直注意到在調色盤上方

有個藍色的星雲

但始終沒有機會拍

要嘛7月暑假被午後雷陣雨影響

8月仰角跟拍攝時間太短放棄

在經過一年的休養後

好不容易回歸昆陽

難得遇上一個一入夜就放晴的夜晚

當然馬上拍起這個肖想很久的目標了

不過因為它的仰角還是低

再加上當晚人車多到爆炸

導致邊邊一直有光害的影響

再加上還想拍其他的XD

而且儀器太久沒玩很不聽話

種種原因導致

我覺得還可以拍更久XD

未來有機會繼續吧

喔對了

我現在覺得這鏡子有夠破

真是糟糕

歷經國考和大四的摧殘

總算能夠擺脫憂鬱

盡情享受滿天星斗

徜徉無垠星空

想必你也不再憂鬱了吧

Date：2022/07/28

Weather：Clear

Location：Kunyang, Mount Hehuan , Nantou, Taiwan

Camera：Canon 6D(mod)

Lens/Telescope：

William Optics ZenitherStar 81+

Flat 6A III

Mount：iOptron CEM40

Guiding：

William Optics Uniguide+ZWO ASI120MM mini+PHD2

Parameter： ISO3200

Exposure time：3min*29

Dark, Flat, Bias

Software：DSS+PS+Starnet++

Blue Horsehead Nebula, known by its catalog destination IC 4592

A reflection nebula was found within the constellation Scorpius, very close to the brighter and more color-saturated Rho Ophiuchi cloud complex.

Mainly comprised of very fine dust, while typically darker in visual appearance but with reflecting the light of the energetic nearby star structures help give it a more saturated and brighter view of the formation.

The primary formation of the horsehead itself measures roughly 40 light-years across and is located about 420 light-years away.

IC4592; IC4601; Blue Horsehead Nebula wide field and Ceres(dwarf planet)