Daily Sunspot Evaluation
Observation Sheet Friday, 19 October 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)
- 52
- Relative number (R)
- 92
- Observer
- ET
- Reading
- all checks consistent
- File
- 19511019.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 3 | 0.86 | 100 | |
| 2 | G – 24 | 0.34 | 281 | |
| 3 | J – 1 | 0.59 | 308 | |
| 4 | C – 24 | 0.19 | 317 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.