Sunspot drawing of 1971-12-18

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https://doi.org/10.7891/e-manuscripta-96860



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1971-12-18
09:00
Hs 1304.5:4655
https://doi.org/10.7891/e-manuscripta-96860
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
345 3 J -2.6 252.7
348 5 J 9.1 238.7
353 10 C 17.1 193.7
354 4 J -13.8 186.5
360/366 23 D 11.3 180.1
361 1 A -14.6 211.2
362 10 B 8.8 139.7
363 3 J -4.6 134.3
364 22 D -14.9 111.6
367 2 A -5.8 106.4
368 1 A -9.2 173.5
369 8 H -16.3 95.3
12 92