The Flickr Rcw33 Image Generatr

This is the final version of the series. It took 3 successive nights to obtain the data, and I could enjoy processing them for a week. I put 60-second and 240-second frames taken with clear filter on HII OIII enhanced starless frame. It resulted in this dust and gas enhanced and stars smaller and crisp image. I could make this deeper image with the gimmick easily. I am happy at the final result.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear 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: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

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 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

This is the final version of the series. It took 3 successive nights to obtain the data, and I could enjoy processing them for a week. I put 60-second and 240-second frames taken with clear filter on HII OIII enhanced starless frame. It resulted in this dust and gas enhanced and stars crisp image. Great Carina Nebula was bright here.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear 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: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

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 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with dual narrowband filter.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear 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: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

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 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with dual narrowband filter.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear 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: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

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 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with dual narrowband filter. Stars near left upper corner trailed due to differential atmospheric refraction near the horizon.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear 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: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

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 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with dual narrowband filter. Stars near left upper corner trailed due to differential atmospheric refraction near the horizon.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband Filter or Clear 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: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5 with NB12 Filter and 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5 with Clear Filter

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 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got far clearer with the filter and starless conversion. It was visible clearly that oxygen III clouds of Vela SuperNova Remnant were distributed faintly and widely toward west. I hope to image the area again with longer optics.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband 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: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5

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 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got far clearer with the filter and starless conversion. It was visible clearly that oxygen III clouds of Vela SuperNova Remnant were distributed faintly and widely toward west. I hope to image the area again with longer optics.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband 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: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5

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 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with the filter. Stars near left upper corner trailed due to differential atmospheric refraction near the horizon.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband 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: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5

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 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Vela SNR got clearer with the filter. Stars near left upper corner trailed due to differential atmospheric refraction near the horizon.

Equipment: Sigma 28mmF1.4 "Art," IDAS NB12 Dual Narrowband 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: 9 times x 1,800 seconds, 8 x 900 sec, 11 x 240 sec, and 12 x 60 seconds at ISO 6,400 and f/3.5

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 11 degrees Celsius or 52 degrees Fahrenheit. Wind was mild, and guide error RMS was 0.73". Sky was dark, and SQML was 21.78 at the night.

Equipment: Sigma 28mmF1.4 "Art" 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: 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5

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 28mmF1.4 "Art" 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: 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5

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 28mmF1.4 "Art" 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: 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5

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 28mmF1.4 "Art" 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: 7 times x 900 seconds, 4 x 240 sec, and 4 x 60 seconds at ISO 1,600 and f/3.5

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.

Gum Nebula was visible clearer in HII OIII starless version below:
www.flickr.com/photos/hiroc/53822710308

We can not see the big red nebula. It is too faint for our unaided eyes to feel directly, but we can feel the existence of Gum Nebula as a vast G-shaped dark part in the sky as below. It spans about 40 degrees. www.flickr.com/photos/hiroc/16311565540

Gum Nebula exists about 1kLY away from us, and the diameter is about 1kLY. It means that Gum Nebula is extremely large and incredibly close to us, almost reaching us by the half way. Gum Nebula is believed to be old supernova remnant, which exploded about 1 million years ago. It means that the gas shell will reach us 1 million years after today, if we can assume that the expanding velocity is constant.

arctan 1/2 = 26.6 degrees, and angular diameter is 2 x 26.6 = 53 degrees, about 40 degrees in digits. The diameter looks to be equivalent to the calculated angle including the faintest parts.

Colin Gum reported the vast hydrogen-alpha region first in 1955. His sketch (1956) is visible here:

"Colin Gum and The Discovery of The Gum Nebula" by Kerr FJ 1971:
ntrs.nasa.gov/citations/19720004102
ntrs.nasa.gov/api/citations/19720004102/downloads/1972000...

Equipment: Sigma 35mmF1.4 DG HSM Art, IDAS NB12 Dual Narrow Band Filter or Clear 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: 14 times x 60 seconds, 7 x 240 sec, and 8 times x 1,800 seconds at ISO 6,400 and f/3.2 with NB12 filter
6 times x 60 seconds, 6 x 240 sec, and 7 times x 900 seconds at ISO 1,600 and f/3.2 with clear filter

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.

Gum Nebula was visible clearer in HII OIII starless version below:
www.flickr.com/photos/hiroc/53822710308

Equipment: Sigma 35mmF1.4 DG HSM Art, IDAS NB12 Dual Narrow Band Filter or Clear 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: 14 times x 60 seconds, 7 x 240 sec, and 8 times x 1,800 seconds at ISO 6,400 and f/3.2 with NB12 filter
6 times x 60 seconds, 6 x 240 sec, and 7 times x 900 seconds at ISO 1,600 and f/3.2 with clear filter

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 DG HSM Art, Clear 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: 6 times x 60 seconds, 6 x 240 sec, and 7 times x 900 seconds at ISO 1,600 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 DG HSM Art, Clear 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: 6 times x 60 seconds, 6 x 240 sec, and 7 times x 900 seconds at ISO 1,600 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.

Detail of faint parts got clearer after the starless conversion, though there remained trailed stars near the horizon and Canopus, bloated by thin clouds, encroached during the imaging sessions.

We can not see the big red nebula. It is too faint for our unaided eyes to feel directly, but we can feel the existence of Gum Nebula as a vast G-shaped dark part in the sky as below. It spans about 40 degrees. www.flickr.com/photos/hiroc/16311565540

Gum Nebula exists about 1kLY away from us, and the diameter is about 1kLY. It means that Gum Nebula is extremely large and incredibly close to us, almost reaching us by the half way. Gum Nebula is believed to be old supernova remnant, which exploded about 1 million years ago. It means that the gas shell will reach us 1 million years after today, if we can assume that the expanding velocity is constant.

arctan 1/2 = 26.6 degrees, and angular diameter is 2 x 26.6 = 53 degrees, about 40 degrees in digits. The diameter looks to be equivalent to the calculated angle including the faintest parts.

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: 14 times x 60 seconds, 7 x 240 sec, and 8 times x 1,800 seconds at ISO 6,400 and f/3.2

Enlarged the frame at 200%, applied StarNet ++ v2.0 (finer tiles, total number of tiles 4,902), and restored back to 100%.

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.

It was too late to take this object in May. The object was too low in the west, and a part of the frame got stars drifted due to differential atmospheric refraction. Atmospheric layer elevated stars near the horizon. North is up, and east is to the left.

We can not see the big red nebula. It is too faint for our unaided eyes. We can feel the existence of Gum Nebula as a vast G-shaped dark part in the sky as below. It spans about 40 degrees.
www.flickr.com/photos/hiroc/16311565540

Colin Gum reported the vast hydrogen-alpha region first in 1955. His sketch (1956) is visible here:

"Colin Gum and The Discovery of The Gum Nebula" by Kerr FJ 1971:
ntrs.nasa.gov/citations/19720004102
ntrs.nasa.gov/api/citations/19720004102/downloads/1972000...

We can not see Gum Nebula on "Atlas Coeli Skalnaté Pleso 1950.0" by Antonín Bečvář or on "Sky Atlas 2000.0" by Wil Tirion and Roger Sinnott, though Vela Supernova Remnant is on "Sky Atlas 2000.0." I have both big atlases. They are beautiful.

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: 14 times x 60 seconds, 7 x 240 sec, and 8 times x 1,800 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.