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Rosette Nebula

Rosette Nebula

The Rosette Nebula, registred under the number Calwell 49, is an H-II region in the constellation Unicorn. As it is not a very well-known or easily identifiable constellation, so we start from Orion to locate it. It is east of Orion, in the extension of the line formed by Meissa (Lambda Orionis) and Betelgeuse. There are several entries from the NGC catalog:

  • NGC 2237: the western part
  • NGC 2238: another part of the nebula
  • NGC 2244 (= NGC 2239): the cluster open in the center
  • NGC 2246: another Rosette emission region

112 x 1 min
Camera : Nikon Z6 partially unfiltered
Telescope : Takahashi FSQ-106ED refractor.
Mount : Takahashi EM-200 homemade electronics.
Guiding : ZWO ASI290MM Mini on QHY OAG-M
Temperature : 2°C
Humidity : 68%
SQM : 21
Software : auto-guiding with PHD2, acquisition with Astro Photography Tool, processing with PixInsight.
Location : Le Plan, Col du Banchet

Face The Colossus

Face The Colossus

We are between 1700 and 3500m above sea level and there is very little snow. It is mild. The landscape is very textured between the roughness of the rock and the snow clinging to it desperately.

Aiguille du Plat de la Selle. Ecrins National Park.

Trunks of Vercors

Trunks of Vercors

A photo of January just after a snowfall. The layer was not very thick for a January month. Less than 5cm at 1200m altitude. And some areas under the trees are almost virgin. It is at 1450m that there are enough to completely cover the ground. Before that, the last serious snowfall was in November. The mild December month had melted everything below 2000m altitude. In 10 years, the snow at these altitudes will probably only be a memory.

Roche de la Muzelle in Evening Dress

Roche de la Muzelle in Evening Dress

Saturday afternoon I went to see the first snows above Allemond. Wintery atmosphere at the top where I got a little frozen feet to enjoy the shades of the sunset.

IC 1805 - Heart Nebula

IC 1805 – Heart Nebula

Another typical nebula of late summer. The Heart Nebula is a region HII neighbor of the Soul Nebula. In the sky, it is located in Cassiopeia, at the end of the tip of Perseus. In the galaxy, she is in the arms of Perseus, 7500 light years from us.

93 x 1min
Camera : Nikon Z6 partially unfiltered
Telescope : Takahashi FSQ-106ED refractor.
Mount : Takahashi EM-200 homemade electronics.
Guiding : Orion Starshoot Autoguider on a William Optic Zenithstar 66SD refractor.
Temperature : 12 to 10°C
Humidity : 70% to 84%
SQM : 21.6
Software : auto-guiding with PHD2, acquisition with Astro Photography Tool, processing with PixInsight.
Location : L’Epine, Hautes-Alpes, France

NGC 1499 - California Nebula

NGC 1499 – California Nebula

Yet another HII region, in Perseus this time. An emission nebula, therefore, the famous ionized hydrogen. Its name comes from its resemblance to the American state. It is 70 light-years long and is 1500 light-years away from us, making it the closest HII region to the solar system.

It’s not an easy to catch object since its best period for photograph it is the rainy season, the autumn, the month of November or December. I did it on September 3rd from 2am and it was still low on the horizon. So I kept only 80 of the 100 exposures I made.

80 exposures of 1 minutes
Camera : Nikon Z6 partially unfiltered

Telescope : Takahashi FSQ-106ED refractor.
Mount : Takahashi EM-200 homemade electronics.
Guiding : Orion Starshoot Autoguider on a William Optic Zenithstar 66SD refractor.
Temperature : 8°C
Humidity : 85% to 95%
SQM : 21.6
Software : auto-guiding with PHD2, acquisition with Astro Photography Tool, processing with PixInsight.
Location : L’Epine, Hautes-Alpes, France

IC 1396 and the Elephant's Trunk Nebula

IC 1396 and the Elephant’s Trunk Nebula

This is a fairly well known HII region in Cephea, an ionized hydrogen region. IC 1396 designates an open star cluster consisting of a few bright stars in the center of the large red nebula. The Elephant Trunk is a dark area in the nebula at the center and a little to the left of the image that vaguely resembles the pachyderm member. His official number is IC 1396A.

Finally, my Nikon Z6 is operational on the deep sky imagery. I removed his IR-Cut filter that allows the adjustment of the white balance for “normal” photos. This unfiltering gave me a hard time. It has two filters: a blue-green one that filters the infrared and a good part of visible red including the wavelength of ionized hydrogen H-Alpha, and a dust filter. Once these filters removed, I end up with a big internal light input on the sensor. I had to decide for a partial unfiltering by putting back the dust filter. Fortunately the disassembly of the camera and relatively easy.

In term of sensitivity, I’m not disappointed. The exposure time speaks for itself since I did poses of 1 minutes whereas it would have taken poses of 10 minutes with my old Canon EOS 1000D. The more we do poses, the more we reduce the noise. So I made 80 and it took only half of the night!

80 exposures of 1 minute
Camera : Nikon Z6 partially unfiltered

Telescope : Takahashi FSQ-106ED refractor.
Mount : Takahashi EM-200 homemade electronics.
Guiding : Orion Starshoot Autoguider on a William Optic Zenithstar 66SD refractor.
Temperature : 10°C
Humidity : 80% to 84%
SQM : 21.6
Software : auto-guiding with PHD2, acquisition with Astro Photography Tool, processing with PixInsight.
Location : L’Epine, Hautes-Alpes, France

Lac Lérié

Lac Lérié

Finally, it’s not that bad, this lake!

It is surrounded by rocks except the north shore which is trampled by cows. Interesting points of view are not easy to find.

(Français) Chambre avec vue...

(Français) Chambre avec vue…

I tried to escape to the warm weather by going for a little coolness in the Vercors. I did not really find… Camp site for one night with the view on Hauts Plateaux du Vercors.

Mont Granier

Mont Granier

A seasonal photo … yes, it is ! Sunset on Mont Granier, Chartreuse Massif. It was six months ago and it was the same weather as today, just a little less warm.