Daily Sunspot Evaluation
Observation Sheet Sunday, 7 July 1957
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)
- 11
- Number of spots (f)
- 67
- Relative number (R)
- 177
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570707.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 1 | 25 | 2 | |
| 2 | B – 9 | 14 | 5 | |
| 3 | J – 1 | 34 | 64 | |
| 4 | D – 12 | -11 | 40 | |
| 5 | F – 20 | -29 | 23 | |
| 6 | J – 2 | -15 | 22 | |
| 7 | J – 1 | -15 | 49 | |
| 8 | C – 4 | -11 | 65 | |
| 9 | D – 5 | 11 | 39 | |
| 10 | J – 5 | 14 | 29 | |
| 11 | H – 7 | 13 | 20 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.