Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 March 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)
- 11
- Number of spots (f)
- 43
- Relative number (R)
- 153
- Observer
- MH
- Reading
- all checks consistent
- File
- 19560320.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | B – 4 | 0.49 | 4 | |
| 2 | B – 3 | 0.66 | 7 | |
| 3 | A – 1 | 0.77 | 21 | |
| 4 | C – 2 | 0.94 | 27 | |
| 5 | C – 2 | 0.8 | 37 | |
| 6 | ? – 1 | 0.99 | 93 | |
| 7 | B – 2 | 0.24 | 176 | |
| 8 | C – 5 | 0.28 | 191 | |
| 9 | G – 3 | 0.63 | 222 | |
| 10 | E – 16 | 0.79 | 281 | |
| 11 | B – 4 | 0.44 | 334 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.