Daily Sunspot Evaluation
Observation Sheet Thursday, 19 May 1955
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)
- 3
- Number of spots (f)
- 12
- Relative number (R)
- 42
- Observer
- MH
- Reading
- all checks consistent
- File
- 19550519.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | D – 7 | 0.64 | 23 | |
| 2 | ? – 2 | 0.95 | 44 | |
| 3 | A – 3 | 0.49 | 300 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.