Daily Sunspot Evaluation
Observation Sheet Tuesday, 4 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)
- 4
- Number of spots (f)
- 36
- Relative number (R)
- 76
- Observer
- ET
- Reading
- all checks consistent
- File
- 19510904.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | E – 30 | 0.37 | 102 | |
| 2 | ? – 2 | 0.34 | 118 | |
| 3 | ? – 1 | 0.42 | 142 | |
| 4 | B – 3 | 0.51 | 317 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.