Daily Sunspot Evaluation
Observation Sheet Tuesday, 10 September 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)
- 7
- Number of spots (f)
- 154
- Relative number (R)
- 224
- Observer
- ET
- Reading
- all checks consistent
- File
- 19570910.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 54 | 12 | 6E | ||||
| 2 | C – 6 | -22 | 51E | ||||
| 3 | H – 4 | -43 | 51E | ||||
| 4 | E – 15 | -16 | 17E | ||||
| 5 | G – 34 | -13 | 4E | ||||
| 6 | B – 19 | -7 | 13W | ||||
| 7 | E – 22 | -23 | 43W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.