Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Fatma Yılmaz Esin Observer record

← All observers
FY
Staff
357
Observation days
15
Years with observations
23.8
Mean days / year
62
Best year (1957)
21.07.1955
14.08.1986
First / last observation

1955 20 days

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Jul 3
Aug 5
Sep 7
Oct 5

1956 45 days

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Feb 1
Mar 2
Apr 4
May 5
Jun 7
Jul 6
Aug 3
Sep 4
Oct 5
Nov 3
Dec 5

1957 62 days

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Jan 2
Feb 5
Mar 4
Apr 4
May 5
Jun 5
Jul 3
Aug 10
Sep 10
Oct 6
Nov 4
Dec 4

1958 54 days

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Feb 5
Mar 5
Apr 5
May 6
Jun 6
Jul 8
Aug 4
Sep 3
Oct 6
Nov 4
Dec 2

1959 51 days

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Jan 4
Feb 3
Mar 3
Apr 6
May 5
Jun 5
Jul 2
Aug 3
Sep 6
Oct 6
Nov 4
Dec 4

1960 36 days

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Jan 4
Feb 5
Mar 3
Apr 4
May 4
Jun 6
Jul 5
Aug 5

1962 47 days

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Apr 4
May 7
Jun 6
Jul 5
Aug 6
Sep 9
Oct 4
Nov 6

1963 19 days

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Jan 1
Mar 3
Apr 2
May 2
Jun 4
Jul 4
Aug 3

1969 7 days

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Mar 2
Apr 2
May 2
Aug 1

1973 4 days

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Aug 4

1978 5 days

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Aug 2
Sep 3

1979 2 days

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Sep 2

1982 1 days

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Jul 1

1983 2 days

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Oct 1
Nov 1

1986 2 days

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Aug 2