Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Sunspot Records 1950–2007

13,360 / 15,663 sheets usable

Years usable / all sheets

19502 / 9 1951253 / 266 1952270 / 291 1953287 / 303 1954286 / 292 1955284 / 299 1956270 / 299 1957262 / 299 1958264 / 307 1959231 / 280 1960235 / 271 1961233 / 261 1962210 / 254 1963194 / 258 1964246 / 274 1965245 / 280 1966224 / 261 1967244 / 297 1968241 / 278 1969224 / 266 1970262 / 291 1971274 / 283 1972231 / 251 1973263 / 303 1974279 / 292 1975280 / 302 1976257 / 287 1977246 / 275 1978239 / 271 1979209 / 285 1980207 / 256 1981248 / 288 1982254 / 301 1983229 / 295 1984260 / 290 1985271 / 292 1986262 / 278 1987221 / 254 1988215 / 272 1989187 / 209 1990168 / 293 1991217 / 252 1992222 / 273 1993241 / 265 1994257 / 283 1995266 / 275 1996111 / 235 1997218 / 237 1998211 / 248 1999181 / 265 2000173 / 272 2001203 / 276 200282 / 279 2003239 / 252 2004266 / 280 2005216 / 236 2006221 / 238 2007269 / 284

Sheets of 2003 252 sheets · 239 usable · mean R 93.0

DrawingDategfRReading
04.01.2003 652112 all checks consistent
07.01.2003 930120 all checks consistent
08.01.2003 847127 all checks consistent
10.01.2003 867147 all checks consistent
15.01.2003 930120 all checks consistent
16.01.2003 1048148 all checks consistent
17.01.2003 ——— reading could not be verified
18.01.2003 1036136 all checks consistent
29.01.2003 ——— reading could not be verified
02.02.2003 41858 all checks consistent
04.02.2003 23656 all checks consistent
06.02.2003 640100 all checks consistent
09.02.2003 832112 all checks consistent
16.02.2003 3838 all checks consistent
17.02.2003 1414 all checks consistent
20.02.2003 32151 all checks consistent
21.02.2003 550100 all checks consistent
26.02.2003 3333 all checks consistent
28.02.2003 51868 all checks consistent
01.03.2003 62888 all checks consistent
02.03.2003 ——— reading could not be verified
08.03.2003 733103 all checks consistent
10.03.2003 62888 all checks consistent
11.03.2003 63393 all checks consistent
12.03.2003 63393 all checks consistent
13.03.2003 ——— reading could not be verified
15.03.2003 736106 all checks consistent
17.03.2003 33262 all checks consistent
18.03.2003 ——— reading could not be verified
19.03.2003 31242 counts consistent, some coordinates doubtful
20.03.2003 31040 all checks consistent
22.03.2003 1111 all checks consistent
23.03.2003 31242 all checks consistent
24.03.2003 41656 all checks consistent
25.03.2003 62181 all checks consistent
26.03.2003 640100 all checks consistent
27.03.2003 54595 all checks consistent
28.03.2003 871151 all checks consistent
29.03.2003 878158 all checks consistent
30.03.2003 878158 all checks consistent
02.04.2003 1081181 all checks consistent
03.04.2003 857137 all checks consistent
04.04.2003 841121 all checks consistent
07.04.2003 51363 all checks consistent
09.04.2003 61575 all checks consistent
10.04.2003 51767 all checks consistent
12.04.2003 32454 all checks consistent
15.04.2003 3838 all checks consistent
20.04.2003 52272 all checks consistent
21.04.2003 53181 all checks consistent
22.04.2003 744114 all checks consistent
23.04.2003 867147 all checks consistent
24.04.2003 43575 all checks consistent
26.04.2003 956146 all checks consistent
27.04.2003 1177187 all checks consistent
29.04.2003 8102182 all checks consistent
30.04.2003 880160 all checks consistent
01.05.2003 7108178 all checks consistent
02.05.2003 7104174 all checks consistent
03.05.2003 7113183 all checks consistent
04.05.2003 9105195 all checks consistent
05.05.2003 755125 all checks consistent
06.05.2003 754124 counts consistent, some coordinates doubtful
07.05.2003 42060 all checks consistent
08.05.2003 3636 all checks consistent
09.05.2003 2323 all checks consistent
10.05.2003 2424 all checks consistent
11.05.2003 ——— reading could not be verified
12.05.2003 61373 all checks consistent
13.05.2003 61676 all checks consistent
14.05.2003 ——— reading could not be verified
15.05.2003 52171 all checks consistent
16.05.2003 52272 all checks consistent
17.05.2003 52474 all checks consistent
18.05.2003 42262 all checks consistent
19.05.2003 53585 all checks consistent
20.05.2003 645105 all checks consistent
21.05.2003 42868 all checks consistent
22.05.2003 52676 all checks consistent
23.05.2003 71888 all checks consistent
24.05.2003 4646 all checks consistent
26.05.2003 43070 all checks consistent
27.05.2003 54393 all checks consistent
28.05.2003 54898 all checks consistent
29.05.2003 468108 all checks consistent
30.05.2003 33565 all checks consistent
31.05.2003 32252 all checks consistent
01.06.2003 52373 all checks consistent
02.06.2003 41858 all checks consistent
03.06.2003 32656 all checks consistent
04.06.2003 42969 all checks consistent
05.06.2003 53585 all checks consistent
06.06.2003 650110 all checks consistent
07.06.2003 682142 all checks consistent
08.06.2003 568118 all checks consistent
09.06.2003 597147 all checks consistent
10.06.2003 6123183 all checks consistent
11.06.2003 6102162 all checks consistent
12.06.2003 680140 all checks consistent
13.06.2003 669129 all checks consistent
14.06.2003 63797 all checks consistent
15.06.2003 42464 all checks consistent
16.06.2003 43373 all checks consistent
17.06.2003 51969 all checks consistent
18.06.2003 736106 all checks consistent
19.06.2003 660120 all checks consistent
20.06.2003 477117 all checks consistent
21.06.2003 44989 all checks consistent
22.06.2003 34676 all checks consistent
23.06.2003 645105 all checks consistent
24.06.2003 742112 all checks consistent
25.06.2003 737107 all checks consistent
26.06.2003 831111 all checks consistent
27.06.2003 953143 all checks consistent
28.06.2003 947137 all checks consistent
29.06.2003 ——— reading could not be verified
30.06.2003 960150 all checks consistent
01.07.2003 1049149 counts consistent, some coordinates doubtful
02.07.2003 971161 all checks consistent
03.07.2003 660120 counts consistent, some coordinates doubtful
04.07.2003 35484 all checks consistent
05.07.2003 36292 all checks consistent
06.07.2003 44888 all checks consistent
07.07.2003 663123 all checks consistent
08.07.2003 669129 all checks consistent
09.07.2003 648108 all checks consistent
10.07.2003 647107 all checks consistent
11.07.2003 44080 all checks consistent
12.07.2003 53686 all checks consistent
13.07.2003 1048148 all checks consistent
14.07.2003 949139 all checks consistent
15.07.2003 1051151 all checks consistent
16.07.2003 1062162 all checks consistent
17.07.2003 956146 all checks consistent
18.07.2003 1193203 all checks consistent
19.07.2003 9120210 counts consistent, some coordinates doubtful
20.07.2003 11136246 all checks consistent
21.07.2003 ——— reading could not be verified
22.07.2003 963153 all checks consistent
23.07.2003 937127 all checks consistent
24.07.2003 932122 all checks consistent
25.07.2003 61070 all checks consistent
26.07.2003 5656 all checks consistent
27.07.2003 3434 all checks consistent
28.07.2003 52676 all checks consistent
29.07.2003 42060 all checks consistent
30.07.2003 42666 all checks consistent
31.07.2003 51868 all checks consistent
01.08.2003 42868 all checks consistent
02.08.2003 735105 all checks consistent
03.08.2003 754124 all checks consistent
04.08.2003 63595 all checks consistent
05.08.2003 647107 all checks consistent
06.08.2003 759129 all checks consistent
07.08.2003 738108 all checks consistent
08.08.2003 ——— reading could not be verified
09.08.2003 54595 all checks consistent
11.08.2003 554104 all checks consistent
12.08.2003 554104 all checks consistent
13.08.2003 649109 all checks consistent
14.08.2003 43575 all checks consistent
15.08.2003 462102 all checks consistent
16.08.2003 45494 all checks consistent
17.08.2003 643103 all checks consistent
18.08.2003 43474 all checks consistent
19.08.2003 53484 all checks consistent
20.08.2003 843123 all checks consistent
21.08.2003 42666 all checks consistent
22.08.2003 556106 all checks consistent
23.08.2003 561111 all checks consistent
24.08.2003 775145 all checks consistent
25.08.2003 54494 all checks consistent
26.08.2003 646106 all checks consistent
27.08.2003 744114 all checks consistent
28.08.2003 856136 all checks consistent
29.08.2003 ——— reading could not be verified
30.08.2003 63090 all checks consistent
31.08.2003 52070 all checks consistent
01.09.2003 63191 all checks consistent
03.09.2003 41757 all checks consistent
08.09.2003 1919 all checks consistent
10.09.2003 22848 all checks consistent
11.09.2003 22444 all checks consistent
12.09.2003 22040 all checks consistent
13.09.2003 32353 all checks consistent
15.09.2003 41555 all checks consistent
17.09.2003 ——— reading could not be verified
18.09.2003 52878 all checks consistent
19.09.2003 51666 all checks consistent
20.09.2003 51161 all checks consistent
21.09.2003 43171 all checks consistent
22.09.2003 44585 all checks consistent
23.09.2003 662122 all checks consistent
24.09.2003 43676 all checks consistent
25.09.2003 45595 all checks consistent
26.09.2003 489129 all checks consistent
29.09.2003 758128 all checks consistent
02.10.2003 63393 all checks consistent
03.10.2003 739109 all checks consistent
04.10.2003 554104 all checks consistent
05.10.2003 44181 all checks consistent
06.10.2003 32555 all checks consistent
07.10.2003 31646 all checks consistent
08.10.2003 43474 all checks consistent
09.10.2003 42666 all checks consistent
10.10.2003 31343 all checks consistent
11.10.2003 61171 all checks consistent
12.10.2003 3434 all checks consistent
13.10.2003 2323 all checks consistent
14.10.2003 000 all checks consistent
15.10.2003 2626 all checks consistent
18.10.2003 31444 all checks consistent
19.10.2003 31949 all checks consistent
20.10.2003 33969 all checks consistent
21.10.2003 43070 all checks consistent
22.10.2003 43676 all checks consistent
23.10.2003 12636 all checks consistent
24.10.2003 23858 all checks consistent
27.10.2003 5113163 all checks consistent
28.10.2003 7107177 all checks consistent
29.10.2003 9113203 all checks consistent
31.10.2003 7153223 all checks consistent
01.11.2003 681141 all checks consistent
02.11.2003 861141 all checks consistent
03.11.2003 43272 all checks consistent
04.11.2003 5757 all checks consistent
10.11.2003 31242 all checks consistent
14.11.2003 2828 all checks consistent
15.11.2003 11323 all checks consistent
16.11.2003 31444 all checks consistent
17.11.2003 31545 all checks consistent
19.11.2003 53282 all checks consistent
20.11.2003 43474 all checks consistent
21.11.2003 650110 counts consistent, some coordinates doubtful
22.11.2003 44686 all checks consistent
23.11.2003 44282 all checks consistent
28.11.2003 ——— reading could not be verified
29.11.2003 838118 all checks consistent
30.11.2003 941131 all checks consistent
05.12.2003 31545 all checks consistent
06.12.2003 31646 all checks consistent
09.12.2003 2222 all checks consistent
10.12.2003 3333 all checks consistent
11.12.2003 3434 all checks consistent
12.12.2003 2323 all checks consistent
20.12.2003 62888 all checks consistent
22.12.2003 52979 all checks consistent
23.12.2003 54494 all checks consistent
28.12.2003 31747 all checks consistent
29.12.2003 2929 all checks consistent
30.12.2003 2525 all checks consistent
31.12.2003 1111 all checks consistent

Click a date for the group table and the drawing. “—”: the reading of the sheet could not be verified, numbers are not shown; see the drawing.