Daily Sunspot Evaluation
Observation Sheet Saturday, 9 February 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)
- 79
- Relative number (R)
- 189
- Observer
- WG
- Reading
- all checks consistent
- File
- 19570209.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 4 | 13 | 57E | ||||
| 2 | A – 1 | 8 | 55E | ||||
| 3 | A – 1 | -26 | 72E | ||||
| 4 | C – 6 | -23 | 42E | ||||
| 5 | G – 30 | -26 | 20E | ||||
| 6 | C – 7 | -13 | 8W | ||||
| 7 | C – 12 | -22 | 20W | ||||
| 8 | A – 2 | -16 | 21W | ||||
| 9 | C – 9 | -21 | 57W | ||||
| 10 | A – 2 | 16 | 53W | ||||
| 11 | B – 5 | 25 | 20W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.