Daily Sunspot Evaluation
Observation Sheet Thursday, 10 October 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)
- 16
- Number of spots (f)
- 158
- Relative number (R)
- 318
- Observer
- ET
- Reading
- all checks consistent
- File
- 19571010.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 32 | 20 | 10E | ||||
| 2 | D – 19 | 25 | 26E | ||||
| 3 | ? – 2 | 23 | 82E | ||||
| 4 | ? – 2 | 12 | 81E | ||||
| 5 | A – 3 | 9 | 34E | ||||
| 6 | A – 2 | -7 | 22E | ||||
| 7 | A – 2 | -9 | 61E | ||||
| 8 | C – 22 | -17 | 66E | ||||
| 9 | B – 10 | -40 | 22W | ||||
| 10 | G – 2 | -15 | 19W | ||||
| 11 | A – 4 | -16 | 57W | ||||
| 12 | ? – 1 | -22 | 75W | ||||
| 13 | A – 1 | -6 | 60W | ||||
| 14 | E – 27 | 15 | 34W | ||||
| 15 | B – 12 | 13 | 18W | ||||
| 16 | B – 17 | 40 | 50W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.