On Friday, 4 November 2022 at 10:54:49 UTC+1, StarDust wrote:
On Thursday, November 3, 2022 at 10:54:42 AM UTC-7, mant...@gmail.com wrote:
Can you count the number of sunspots on the attached image of solar disc ? 152 views
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18:45 (8 minutes ago)
to
swc.nict.go.jp/en/trend/sunspot.html
I cunt 9!
Did I win?
😎
thank you
9 is number of stations, reporting their SSN
But SSN Index is 88 ;)))))))
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what is calculated below is not sunspots count
R = K (10g + s)
The relative sunspot number is defined as R = K (10g + s), where g is the number of sunspot groups and s is the total number of distinct spots. The scale factor K (usually less than unity) depends on the observer and is intended to effect the conversion
to the scale originated by Wolf.
How to get scale factor K for this image ?
What is a number of groups of sunspots ?
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There is another site, featuring higher resolution images: 2M, 4M
from spaceweather.com
2M labeled sunspots image
spaceweather.com/images2022/03nov22/hmi1898.gif
4M no labels sunspots image spaceweather.com/images2022/03nov22/hmi4096_blank.jpg
Sunspot number: 65
4M is clear, sharp Sunspot number: 65 ???
3135 label - 2 sunspots/ groups
3136 label - 2 sunspots/ groups
R = K (10g + s) = 65 ?
what is a number of groups in the image ?
Relative sunspot number stays for what ?
I am interested to count raw number of sunspots, raw number of sunspot groups for the given image resolution.
https://astronomy.stackexchange.com/questions/50939/how-a-sunspot-number-is-calculated-by-an-individual-observer?noredirect=1#comment113760_50939
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