Daily Sunspot Evaluation
Observation Sheet Tuesday, 24 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)
- 14
- Number of spots (f)
- 178
- Relative number (R)
- 318
- Observer
- ET
- Reading
- all checks consistent
- File
- 19570924.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 25 | 49E | ||||
| 2 | C – 5 | 21 | 40E | ||||
| 3 | E – 51 | 14 | 38E | ||||
| 4 | D – 9 | 12 | 61E | ||||
| 5 | ? – 2 | 16 | 83E | ||||
| 6 | J – 5 | -26 | 57E | ||||
| 7 | B – 6 | -17 | 5E | ||||
| 8 | B – 5 | -10 | 7W | ||||
| 9 | A – 2 | -4 | 7W | ||||
| 10 | D – 13 | -21 | 61W | ||||
| 11 | H – 20 | 8 | 60W | ||||
| 12 | E – 24 | 11 | 41W | ||||
| 13 | B – 3 | 8 | 28W | ||||
| 14 | E – 32 | 23 | 64W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.