Daily Sunspot Evaluation
Observation Sheet Thursday, 12 April 1956
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 14
- Number of spots (f)
- 103
- Relative number (R)
- 243
- Observer
- AK
- Reading
- all checks consistent
- File
- 19560412.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 2 | 0.69 | 2 | |
| 2 | B – 6 | 0.56 | 6 | |
| 3 | J – 1 | 0.6 | 17 | |
| 4 | D – 10 | 0.77 | 40 | |
| 5 | C – 10 | 0.92 | 41 | |
| 6 | A – 15 | 0.69 | 85 | |
| 7 | E – 25 | 0.9 | 97 | |
| 8 | H – 4 | 0.48 | 98 | |
| 9 | A – 2 | 0.69 | 222 | |
| 10 | A – 2 | 0.9 | 282 | |
| 11 | J – 4 | 0.84 | 294 | |
| 12 | C – 6 | 0.54 | 303 | |
| 13 | C – 13 | 0.54 | 321 | |
| 14 | A – 3 | 0.44 | 350 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.