More Jellyfish…

Last night I was able to add some more SII and OIII frames to the image of the Jellyfish Nebula I posted recently. This has helped with the background noise, and a little deconvolution in PixInsight sharpened the image up considerably. This is now 20 Ha, 12 SII and 11 OIII frames of 10min each.



Shown below is a bi-colour image of IC410 in Auriga, sometimes referred to as the Tadpole Nebula, which was composed from 10 x 10min exposures each of H-alpha and OIII.

Celestial Jellyfish

This is a narrowband image of IC443 in Gemini, aka the Jellyfish Nebula. Taken through a WO GT-102 with an Atik One 6.0, it’s put together from 20 x 10min H-alpha, 6 x 10 min OIII and 6 x 10min SII. The nebula is notable for its quite weak OIII emission, but it’s really quite strong in SII. R=Ha, G=SII, B=OIII.

First Light

I’ve always known that it’s a bad idea to go visiting astronomy shops, but sometimes you just can’t help yourself. Last Monday I went to visit the Widescreen Centre’s new place near Ely and came out with a William Optics GT-102… So here are some first images from last night, taken with an Atik 460ex OSC. There’s comet C/2017 O1 ASASSN which is lurking near Polaris, and getting quite faint now, by the looks of it. And then there’s the Double Cluster, M37 in Auriga, and the Crab Nebula… I still need to optimise the spacing of the camera from the field flattener, but I’m hoping for some nice images from this scope 


The Triangulum Galaxy

It was good to get outside last night!! Here’s a quick image of M33 through the Equinox 80. 6 x 5min of luminance, and 5 x 3min each of R, G and B, all binned 2×2. No flats, darks or biases used, although I could have stretched it further if I’d done some flats… I used the new ArcsinhStretch function in PixInsight during processing – it certainly keeps the colour in the stars!

Total solar eclipse

I travelled to the US to see last week’s total eclipse from just north of Madras, Oregon. From our position, we had 1m 30s of totality – nowhere near enough! below is a sequence of frames taken during the eclipse. What I did find interesting – although they don’t show up on the overexposed totality images – was that some solar prominences were clearly visible through the camera viewfinder. The totality images do however show the extent of the solar corona, and the presence of a number of sunspots helps to make the iamges from the partial phase more interesting.

The Tulip Nebula

This is an image of Sh2-101, the Tulip Nebula, in Cygnus. It’s an HaRGB image; 10 x 10min Ha, 6 x 3min for R, G and B, all binned 2 x 2. I think I’ll revisit this later in the summer when it’s a bit higher in the sky and add some more photons to it. Taken with the Atik One and Equinox 80.