Daily Sunspot Evaluation
Observation Sheet Sunday, 19 August 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)
- 2
- Number of spots (f)
- 29
- Relative number (R)
- 49
- Observer
- MH
- Reading
- all checks consistent
- File
- 19510819.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | B – 10 | 0.53 | 158 | |
| 2 | C – 19 | 0.42 | 205 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.