Comet C/2018 Y1 Iwamoto
Category Archives: deepsky
The Horsehead nebula (again)
After a long spell of clouds, snow and rain, clear skies have returned. Apart from the streak artefacts in the background I like this image a lot, this is my first properly focused image with the Baader h-alpha filter.
Lightweight Astrophotography
On December 26th we were invited to christmas dinner at my sisters place. I brought the Vixen Polarie, the Takahashi FS-60CB and the Nikon D750 to do some astrophotgraphy during the evening.
The image above records some faint nebulosity across central Orion. From the horsehead nebula B33 silhouetted against IC434 to the flame nebula NGC 2024. In the upper left, the M78 nebula with its surrounding NGC objects is also visible. In the corner a hint of Barnards loops is discernible
Read MoreB33 – horsehead nebula
Barnard 33 is the horse-head shaped dark cloud silhouetted agains the glow of excited hydrogen which goes by the name of IC434. To the left is the Flame Nebula NGC2024, which is an odd nebula, because it is orange, and apparently a mixture between reflection and emission nebula.
Read MoreCalifornia Nebula NGC1499 in H-alpha
Today I used a break in the clouds to test how the astro-modified Nikon D7000 works with a h-alpha Filter. As the weather was very unstable, I didn’t set up the laptop for guiding, so some images were unusable due to trailing and passing clouds and full cloud cover at the end of the exposure resulted in oly 83x30s unguided exposures. Which way too short, but I am happy with the result under these circumstances.
NGC1499, Baader Planetarium, 1,25″ h-alpha Filter, 83x30s (41,5m) exposure, Astro-Professional 80mm f/7 refractor.
Two Nights, Two Scopes, Two Targets
In the first night I used my 80mm f/7 ED Apo for unguided 30s sub-exposures, in the second night, the 127mm f/8 Apo with 120s guided exposures…
M31, The Andromeda Galaxy, 199x30s, Nikon D750, Astro-Professinal 80mm f/7 refractor, processed in Regim, Fitswork, Photoshop and Lightroom
Full spectrum modification of a Nikon D7000 – Part II
On November 5th I had the opportunity to do another test, this time using the 300mm lens, I also used the California Nebula as the target.
NGC1499, the California Nebula, 192x30s (1h 21min), Nikon D7000a, AF-S NIKKOR 300 mm 1:4E PF ED VR, calibrated in Regim, processed in Fitswork, Photoshop and Lightroom. Mount: Vixen Polarie.
The California nebula is hydrogen gas which is irradiated by the intense UV radiaton from Xi Persei, the bright star near the center of the image. It is about 1250 light years distant and is one of the intrinsically brightest and hottest stars visible to the unaided eye. It weighs in at about 40 solar masses. The surface temperature is a whopping 35000 Kelvin.
NGC 281 – The Pacman nebula
GC 281 an emission nebula in Cassiopeia
The Pacman nebula, as NGC 281 is also called becaue of it’s shape, is special for me, as I stumbled upon it in an image I took of coment Hale Bopp in 1997. Since that time I wanted to make close-up image of this small emission nebula.
NGC 281 – Emission nebula in Cassiopeia, 56x180s, Astro-Professional 80mm f/7 ED refractor, QHY163c cooled CMOS camera. Cropped.
NGC891
NGC 891 is a beautiful spiral galaxy which is seen perpendicular to it’s rotational axis, so we see it edge on.
It is located in Andromeda, so there are many foreground stars.
I have seen it in telescopes as small as 15cm aperture, in my 250mm the dust lane becomes visible, but in a larger scope, like the 40cm I recently observed with, it is a really beautiful sight. But of course not as detailed as in this image.
NGC 891, Galaxy in Andromeda, distance: ~30 million light-years- 45*180s (2h 15min), QHY163c, Astro-Physics 127mm f/8 refractor.
Testing the QHY163c camera
The Vorarlberger Amateur Astronomen acquired a QHY163c cooled CMOS camera. It is based on a Panasonic Micro-Four-Thirds (m43) sensor, but has added cooling and an astronomical suitable ir-cut filter. Read More