Sunspots in August 2011

During the August, weather was not so favourable as it was in July, and I was able to make only 18 observations, which is still quite good amount! In August, It was possible for me and for many others to witness the growth and fading of couple of gigantic sunspt groups in early August. Actually, those sunspots groups were so large, that it was possible to see them with naked eye! Actually I was able to see them in four days in row in early August. I made NAE observations in ten days in August. The average NAE spot number in those days was 0,6. But the total amount of my observations was 18, and it is very reasonable to assume, that there wasn’t any NAE spots in the Sun after the four first days of August, which means that my NAE average would be 0,3 (2+2+1+1/18 = 0,333). Besides those gigantic spots, there was also the second spotless day of this year in August. (according to Spaceweather.com there has been one spotless day in this year before august), that happened 14.8. After that, the amount of sunspots was going up again.

My sunspot observations in August 2011 as a table:

My sunspot observations in August 2011 as a graph:

It is reasonable to assume, that this August might have been the last complete month with solar observations for me this year. The reason to this is the fact that winter is getting closer, and the altitude of the Sun is getting lower and lower and also the weather might not be so good during autumn that it was in summer. I think it is possible to do at least some solar observations in early september, but after that, I think the solar observing season is over for this year.

With sunny greetings,

Juha

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Re-starting observing season 2011-2012

Observing session #5/11-12

About a month ago, I spent couple of weeks in Turku, where nights were already getting dark. I was also able to make some night sky -observations then. But then I had to go north again back to Sodankylä, which also meant that there would be a considerable break for me in the observing season that had just started while I was in Turku.

Nevertheless, now nights are getting dark enough for night time observations also here up north! And this means, that I’m able to re-start my observing season! I did my re-start in village called Aavasaksa in the western Lapland, very close to Swedish border. In the Aavasaksa village is situated a hill called Aavasaksanvaara, and I was able to re-start my observing season on top of the hill in 24/25.8.2011. The night was very short, and I was able to make observations during deep nautical twilight. Anyway, the night was already dark enough that I was able to see the most brightest parts of the Milky Way!

Because I had to be working in the next morning, I wasn’t able to observe all night till sunrise. During the night I made observation of R Cyg, whose brightness had dropped from 10.1 to 11.0. Besides that, I made also SQM -measurements, and I actually got relatively good readings: SQM (zenith) 19,92 and NELM 5,1.

And now I’m just waiting clear nights…

Summary of obs session #5/11-12
Date: 24/25.8.2011
Time: 00.30-01.00
Place: Aavasaksa, Ylitornio, Finland
Instruments used: L102/1000mm, naked eye
Objects observed: R Cyg,
Conditions: NELM: 5.1, SQM: 19.92, clear sky, nautical twilight, moist and warm air

Sunspots July 2011

In July the Sun was shining much, and I was able to do observations in 20 days. The Solar activity has been in high level during July, and I got the highest monthly average so far this year in July, the average Wolf’s number in July was 51,05.

Nevertheless, there was a short period with quiet activity in late July. Anyway, the activity was increasing again during the last days of July, which was also indicated by the birth of three gigantic sunspot groups, that are still visible in the Sun while I’m writing this! For example Spaceweather.com -site was reprting about those huge sunspots! And actually I when I was cheking the sunspots today, I was finally able to see two of those gigantic spots also with naked eye!

And finally the table of my sunspot observations from July:

And the graph:

With sunny greetings,

Juha