Daily Sunspot Evaluation
Observation Sheet Thursday, 6 September 1951
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)
- 5
- Number of spots (f)
- 40
- Relative number (R)
- 90
- Observer
- WG
- Reading
- all checks consistent
- File
- 19510906.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | R – 1 | 0.98 | 111 | |
| 2 | A – 1 | 0.86 | 121 | |
| 3 | H – 13 | 0.74 | 123 | |
| 4 | J – 1 | 0.22 | 219 | |
| 5 | D – 24 | 0.1 | 337 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.