Sunday, April 1, 2018

April 2018

April 20th 1250  GMT

I checked the Sun in hydrogen alpha light and took some afocal shots with my PST and DSLR. It was quiet again.


I had seen some activity on the SOHO images and it was natural for me to check it out. The review binoculars gave me a great view the Moon, with great contrast. There was some minor chromatic aberration. I had some difficulty getting the solar filters on, as the caps are attached. The view of the Sun was brighter than with my own bins but I did not see any activity. The chromatic aberration was minimal.

April 19th 2110 GMT

I went out again with the review binoculars. I started off with the Beehive (M44), one of my favourite objects. It did not look much different to the view through my own bins but the lack of astigmatism at the edge of the field of view showed the background stars. Next up was Melotte 111 and I saw a satellite pass through it. I started generally browsing around and the review binoculars really showed their capabilities! Melotte 20 showed better than with my bins and I was able to pick out M36, M37 and M38 in Auriga. This was at an unfavourable elevation and with the Moon only a few degrees away. I could also see M35. I picked off Mizar/Alcor and Nu Draconi but no surprises there. What really surprised me was being able to see M65 and M66 in Leo. Seeing M81 and M82 was more difficult, as I had to rest my neck. M13 looked superb, despite the poor elevation and I also saw M3 and M51. I only regret that I had to work the next day, so would not be able to stay up after moonset.

April 19th 1940 GMT

I was tempted to snap the Moon and Venus but had a review to write. First Light Optics had lent me some Helios Stellar II 15x70 binoculars. This was especially interesting, as I had bought their predecessor in 2002. My first impression is that they were much more sturdy by design but heavier, too. The build quality was much better than my existing bins. I first tried them on the Moon and the general impression was favourable and the “earthshine” showed much better than with my bins. The only negative was that there were some yellow-orange colour fringes near the limb on the light side but these were worse in my bins. There was no astigmatism, even at the edge of the field of view, unlike my bins.


To both bins, Venus showed a full disc and the brighter stars were clear and sharp. The Stellar II binoculars picked up many fainter stars in the twilight conditions.

April 19th 0750 GMT

I checked out the Sun in hydrogen alpha light early, as not to miss it. It was still quiet.

April 18th 2015 GMT

It was a day of glorious sunshine. From an astronomical point of view, I missed it due to work but at least I was earning. I was home for a late dinner and caught the Moon and Venus in the evening sky with my DSLR at 70mm focal length. I also took some frames of the Moon at 300mm focal length.

April 16th 0715 GMT

There was some hazy sunshine. I decided to take an early look at the Sun in hydrogen alpha light, as the forecast for later was cloudy. Again, the Sun was quiet.

April 14th 2230 GMT

There was lots of haze. Jupiter was low in the south east but I could not see any moons. I was able to see the Beehive (M44) and Melotte 111 but neither were at their best and I did not fancy my chances of getting even a half-decent photo.

April 14th 1950 GMT

It was clear, with Venus in the west. Unfortunately, I was unable to obtain an image using the Bresser Electronic Eyepiece. I saw the planet through an eyepiece but could not tell it from 100% phase.


April 14th 1540 GMT

The Sun was quiet in hydrogen alpha light but it was great to see it again. I caught only part of the disc, though.

April 5th 0900 GMT

The sky was clear, for a change, so I had a go at photographing the Sun in hydrogen alpha light with my PST and DSLR. Although the Sun was quiet, I also tried quadrant shots.

had some detail on one quadrant shot but I had a little idea I was thinking of.

April 4th 2015 GMT

 I set up my DSLR at ISO 6400 (yes, really this time) and aimed it at the pole star, Polaris. I also used 70mm focal length and 7 seconds’ exposure. Some of the frames were ruined by cloud but, yes, I stacked 80 frames in Deep Sky Stacker and actually used dark frames! I was quite pleased with the result, with the Engagement Ring Asterism showing nicely in the centre.

I did a little bit of bin browsing in the west. I could just about make out M41 in Canis Major. The Orion Great Nebula (M42) showed the classis butterfly shape and the Pleiades (M45) and Hyades showed quite well. Melotte 20 in Perseus showed well but the Double Cluster and M34 were tough. I decided to have a go at the Andromeda Galaxy (M31), possibly for the last time in spring. I was amazed to still see it.

April 3rd 2110 GMT

I aimed the camera at M35 at 70mm focal length, ISO 6400 and 7 seconds’ exposure.
Doh!! I had left the ISO on 100 for M35. I went out to check and it was hazy around Gemini, so I aimed it at Leo’s back, once I had set the ISO to 6400.
I could not stack the M35 shots, nor the shots at Leo's back but one of the second set of shots showed Melotte 111 from a single frame.

I took a photo of Arcturus as a separator between two sets of darks and processed it to reveal a few stars.

On the morning of April 5th, I decided to commit a mortal sin by re-running Deep Sky Stacker without dark frame subtraction. It worked on Melotte 111.

April 1st 0900 GMT

Conditions were not perfect, with a lot of thin cloud around. The Sun appeared featureless in hydrogen alpha light but I took some full disc shots anyway.

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