A well-developed Lunar corona 25.1.2013

Observed phenomena: Lunar corona
Date: 25.1.2013
Time: 01:09-01:14
Observing place: Kuru, Ylöjärvi, Finland
Observing method: Photography
Technical information about photographing equipment: Camera: Canon EOS 1100D, lens: Canon EF-S 18-55mm IS


There has been coronas around the Moon almost every night during this week, but tonight’s corona was really the most stunning of them all! This corona was perfectly round in shape and it was very bright. Outside the aureola, there was one ring visible with naked eye, but more rings became visible in the photos. This corona was without a doubt the best so far this year, and this one was just like a dart board in the sky, at least in the photos! The three first photos of this gallery have been made out of several exposures (HDR method) to make both the Moon and the outer parts of the corona visible in the same image. The two last photos are stacked, non-HDR photos.

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Learning HDR method with lunar corona 23.1.2013

Observed phenomena: Lunar corona
Date: 23.1.2013
Time: 17:24
Observing place: Kuru, Ylöjärvi, Finland
Observing method: Photography
Technical information about photographing equipment: Camera: Canon EOS 1100D, lens: Canon EF-S 18-55mm IS

Description: a corona around the Moon was seen also today in the sky of Seitseminen National Park. The corona was caused by fog at surface level. This time only the aureola (the innermost ring) was visible. It means, that the droplet size distribution of the fog was rather large. Based on the apparent size of the aureola, the mean size of the droplets was pretty small.

This time I tried to make a HDR image of the corona. I took series of photos of the Moon and corona with exposure times from 0,5 s to 10 s. By doing like this, I was able to take some shots with the features of the Moon visible and shots with the landscape and trees visible. Then I stacked and edited the photos with GIMP software to make the HDR effect in the image.

And actually the HDR images are a new form of art to me! This was actually my first HDR image ever that I have made! There’s still lots of things to learn about this artform, but you got to start somewhere! I’ll keep on practicing with doing these HDR photos and some day I’ll write a different post about making HDR photos of celestial objects and phenomena!

Lunar corona HDR 23.1.2013
Lunar corona HDR 23.1.2013

A three-ringed lunar corona 22.1.2013

Observed phenomena: Lunar corona
Date: 22.1.2013
Time: 18:30-18:50
Observing place: Kuru, Ylöjärvi, Finland
Observing method: Photography
Technical information about photographing equipment: Camera: Canon EOS 1100D, lens: Canon EF-S 18-55mm IS

Description: a corona appeared in stratocumulus -clouds around the Moon in the sky of Seitseminen National Park tonight. When observing with naked eye, I could discern two rings around the Moon at best. I tried to observe and photograph a multi-ringed corona, and I waited for homogenous enough clouds to appear and make a nice corona. After waiting for a while, the multi-ringed corona appeared in the clouds, and I was able to take the photos that I wanted to take! When viewing the photos on the screen of my computer, I found also a third, faint ring around the Moon!

Aurora borealis 17.1.2013

Observed phenomena: Aurora borealis
Date: 17.1.2013
Time: 20:30-21:15
Observing place: Kuru, Ylöjärvi, Finland
Observing method: Photography
Technical information about photographing equipment: Camera: Canon EOS 1100D, lens: Samyang 8mm fish eye, Canon EF-S 18-55mm IS
Observing conditions: Clear sky, 38% Moon in SW sky, calm, -21 °C

Last night a coronal mass ejection from the Sun hit the Earth, and that lit up the first northern lights of this year (at least for me)! I went to my observing place near the village of Länsi-Aure, Kuru, Finland to see, whether it is possible to drive there in winter or not. But when I arrived at the site, I was positively surprised to see, that the road to the site was open, and it is possible to drive there!

So, then I arrived at the observing site. First there was only a quiet aurora arc in the northern sky, but soon some rays started to develop in the arc, some of them intensively red! Soon the arc had turned into a relatively active aurora belt.

It was nice to see aurora flaming in the sky again, but this time the weather was rather cold, and after documenting the aurorae for an hour, I decided to go back inside to enjoy some hot chocolate and to have a look on the photos on the screen of my laptop.

Observing in Ulvila Observatory 12./13.9.2012

Date: 12.-13.9.2012
Time: 22:30-02:30
Observing site: Ulvila Observatory, Finland
Instrument: C280/2750mm

NELM: 6,0
SQM: 20,73
Darkness of the background sky: 2
Seeing: 2
Transparency: 3
Weather: Clear sky, light wind, no Moon, humid air, +9 °C

Objects observed: Jupiter (visual, sketching), SS Cyg (visual), T Cas (visual), T Ari (visual)

During this session, I was able to make some observations in the Ulvila Observatory. From the observatory, there is open view to every direction, but the light pollution situation is quite bad in this place, and it means, that the Observatory is not ideal for observing objects of the deep sky. And that’s why I observed mostly variable stars during this session. This time the stars that I observed were SS Cyg, T Cas and T Ari. SS Cyg is now back to it’s minimu brigthtness and T Cas is getting fainter. T Ari has been severely underobserved during few last months, but it’s still possible to see from the AAVSO light curve, that the star is getting fainter. Besides variable stars, I also observed and sketched planet Jupiter, which was shining brightly in southern sky.

Jupiter_120913
Jupiter observed in Ulvila Observatory 12./13.9.2012 with C280/2750mm Celestron -telescope @ 110x.

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Variable star observations:

Date Time Star Mag. Comp.
12./13.9.2012 23.53 SS Cyg 12.4 12.3
12./13.9.2012 00.55 T Cas 9.0 8.8/11.0
12./13.9.2012 01.32 T Ari 9.4 9.5/9.7