Daily Sunspot Evaluation
Observation Sheet Sunday, 4 September 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)
- 29
- Relative number (R)
- 99
- Observer
- FY
- Reading
- all checks consistent
- File
- 19550904.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 5 | 0.3 | 23 | |
| 2 | J – 1 | 0.68 | 80 | |
| 3 | J – 2 | 0.34 | 86 | |
| 4 | C – 12 | 0.64 | 91 | |
| 5 | C – 4 | 0.71 | 152 | |
| 6 | B – 3 | 0.62 | 240 | |
| 7 | A – 2 | 0.76 | 260 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.