Daily Sunspot Evaluation
Observation Sheet Friday, 7 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)
- 7
- Number of spots (f)
- 45
- Relative number (R)
- 115
- Observer
- FY
- Reading
- all checks consistent
- File
- 19551007.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 8 | 0.3 | 22 | |
| 2 | A – 9 | 0.32 | 54 | |
| 3 | C – 15 | 0.56 | 68 | |
| 4 | ? – 1 | 0.97 | 137 | |
| 5 | A – 2 | 0.8 | 157 | |
| 6 | B – 2 | 0.76 | 326 | |
| 7 | B – 8 | 0.61 | 338 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.