Daily Sunspot Evaluation
Observation Sheet Wednesday, 19 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)
- 6
- Number of spots (f)
- 70
- Relative number (R)
- 130
- Observer
- MH
- Reading
- all checks consistent
- File
- 19510919.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | E – 34 | 0.2 | 87 | |
| 2 | D – 18 | 101 | ||
| 3 | C – 8 | 108 | ||
| 4 | ? – 3 | 298 | ||
| 5 | C – 6 | 300 | ||
| 6 | A – 1 | 301 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.