Daily Sunspot Evaluation
Observation Sheet Monday, 9 July 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)
- 29
- Relative number (R)
- 79
- Observer
- MH
- Reading
- all checks consistent
- File
- 19510709.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | C – 10 | 0.79 | 82 | |
| 2 | J – 1 | 0.2 | 90 | |
| 3 | E – 10 | 0.93 | 101 | |
| 4 | A – 7 | 0.65 | 109 | |
| 5 | J – 1 | 0.15 | 346 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.