Daily Sunspot Evaluation
Observation Sheet Thursday, 13 October 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)
- 9
- Relative number (R)
- 39
- Observer
- WG
- Reading
- all checks consistent
- File
- 19551013.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 2 | 0.5 | 190 | |
| 2 | C – 6 | 0.95 | 317 | |
| 3 | A – 1 | 0.82 | 328 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.