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SUNSPOT OBSERVATION
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 We have been taking sunspot sketches since August 2004.
 Our data is reported to Oriental Astronomical Association (OAA) every month.
 We also offer oppourtunity of sunspot observation and sketching to visitors.

 This page provides the daily reports of sunspot observation as well as images of our drawings.

Method Projection
Instrument 3 Aug 2004 - 24 Jan 2005
Nikon 10cm Refractor (d=100mm,f=1200mm,F=12)
28 Jan 2005 - now
11.5cm Refractor (d=115mm,f=1875mm,F=15)
Vixen 150 mm projection screen, HM-25mm eyepiece

Graph of Sunspot Relative Numbers（Aug.2004〜)
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Black：Total
Red：The Northern Hemisphere
Blue: The Southern Hemisphere
（13-month running average）
Butterfly Diagram（Aug.2004〜)
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Sunspot Observation Report [Archive] [Explanation]
Year Month
2024 1 2 3 4 5 6 7 8 9 10 11 12
2023 1 2 3 4 5 6 7 8 9 10 11 12
2022 1 2 3 4 5 6 7 8 9 10 11 12
2021 1 2 3 4 5 6 7 8 9 10 11 12
2020 1 2 3 4 5 6 7 8 9 10 11 12
2019 1 2 3 4 5 6 7 8 9 10 11 12
2018 1 2 3 4 5 6 7 8 9 10 11 12
2017 1 2 3 4 5 6 7 8 9 10 11 12
2016 1 2 3 4 5 6 7 8 9 10 11 12
2015 1 2 3 4 5 6 7 8 9 10 11 12
2014 1 2 3 4 5 6 7 8 9 10 11 12
2013 1 2 3 4 5 6 7 8 9 10 11 12
2012 1 2 3 4 5 6 7 8 9 10 11 12
2011 1 2 3 4 5 6 7 8 9 10 11 12
2010 1 2 3 4 5 6 7 8 9 10 11 12
2009 1 2 3 4 5 6 7 8 9 10 11 12
2008 1 2 3 4 5 6 7 8 9 10 11 12
2007 1 2 3 4 5 6 7 8 9 10 11 12
2006 1 2 3 4 5 6 7 8 9 10 11 12
2005 1 2 3 4 5 6 7 8 9 10 11 12
2004 1 2 3 4 5 6 7 8 9 10 11 12
Sunspot Sketch Image [Archive]
Year Month
2024 1 2 3 4 5 6 7 8 9 10 11 12
2023 1 2 3 4 5 6 7 8 9 10 11 12
2022 1 2 3 4 5 6 7 8 9 10 11 12
2021 1 2 3 4 5 6 7 8 9 10 11 12
2020 1 2 3 4 5 6 7 8 9 10 11 12
2019 1 2 3 4 5 6 7 8 9 10 11 12
2018 1 2 3 4 5 6 7 8 9 10 11 12
2017 1 2 3 4 5 6 7 8 9 10 11 12
2016 1 2 3 4 5 6 7 8 9 10 11 12
2015 1 2 3 4 5 6 7 8 9 10 11 12
2014 1 2 3 4 5 6 7 8 9 10 11 12
2013 1 2 3 4 5 6 7 8 9 10 11 12
2012 1 2 3 4 5 6 7 8 9 10 11 12
2011 1 2 3 4 5 6 7 8 9 10 11 12
2010 1 2 3 4 5 6 7 8 9 10 11 12
2009 1 2 3 4 5 6 7 8 9 10 11 12
2008 1 2 3 4 5 6 7 8 9 10 11 12
2007 1 2 3 4 5 6 7 8 9 10 11 12
2006 1 2 3 4 5 6 7 8 9 10 11 12
2005 1 2 3 4 5 6 7 8 9 10 11 12
2004 1 2 3 4 5 6 7 8 9 10 11 12
Table of Sunspot Location [Archive]
Year Month
2024 1 2 3 4 5 6 7 8 9 10 11 12
2023 1 2 3 4 5 6 7 8 9 10 11 12
2022 1 2 3 4 5 6 7 8 9 10 11 12
2021 1 2 3 4 5 6 7 8 9 10 11 12
2020 1 2 3 4 5 6 7 8 9 10 11 12
2019 1 2 3 4 5 6 7 8 9 10 11 12
2018 1 2 3 4 5 6 7 8 9 10 11 12
2017 1 2 3 4 5 6 7 8 9 10 11 12
2016 1 2 3 4 5 6 7 8 9 10 11 12
2015 1 2 3 4 5 6 7 8 9 10 11 12
2014 1 2 3 4 5 6 7 8 9 10 11 12
2013 1 2 3 4 5 6 7 8 9 10 11 12
2012 1 2 3 4 5 6 7 8 9 10 11 12
2011 1 2 3 4 5 6 7 8 9 10 11 12
2010 1 2 3 4 5 6 7 8 9 10 11 12
2009 1 2 3 4 5 6 7 8 9 10 11 12
2008 1 2 3 4 5 6 7 8 9 10 11 12
2007 1 2 3 4 5 6 7 8 9 10 11 12
2006 1 2 3 4 5 6 7 8 9 10 11 12
2005 1 2 3 4 5 6 7 8 9 10 11 12
2004 1 2 3 4 5 6 7 8 9 10 11 12

Let's Make our Butterfly Diagram!
-Kwasan Butterfly Diagram Project-
You can draw a "Butterfly Diagram". Those data was obtained by sunspot drawing at Kwasan Observatory.

[2018-2019]
・2018-2019 Let's Make our Butterfly Diagram(Japanese)
・Data File sunspot_list2018-2019_date-lat.xlsx

[2017]
・2017 Let's Make our Butterfly Diagram(Japanese)
・Data File sunspot_list2017_rev2_date-lat.xlsx

[2016]
・2016 Let's Make our Butterfly Diagram(Japanese)
・Data File sunspot_list2016_date-lat.xlsx
・Format butterfly-diagram_format_2016.pdf
・Sample butterfly-diagram_sample_2016.pdf
・Dr.Brian May, CBE, an astrophysicist and the guitarist for legendary British rock band Queen, visited Kwasan Observatory on January 27,2020.
Please check his Instagram post on January 28.
Instagram brianmayforreal January 28,2020
Sunspot Relative Numbers (Aug.2004 - Mar.2007)
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