Daily Sunspot Evaluation
Observation Sheet Tuesday, 9 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)
- 54
- Relative number (R)
- 164
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570709.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | 33 | 37E | ||||
| 2 | B – 4 | -14 | 54E | ||||
| 3 | D – 7 | -11 | 13E | ||||
| 4 | E – 11 | -30 | 50W | ||||
| 5 | A – 1 | -16 | 48W | ||||
| 6 | J – 1 | -14 | 80W | ||||
| 7 | D – 5 | 11 | 67W | ||||
| 8 | A – 6 | 15 | 56W | ||||
| 9 | J – 3 | 15 | 47W | ||||
| 10 | B – 3 | 25 | 50W | ||||
| 11 | C – 10 | 13 | 21W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.