Daily Sunspot Evaluation
Observation Sheet Sunday, 29 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)
- 12
- Number of spots (f)
- 150
- Relative number (R)
- 270
- Observer
- ET
- Reading
- all checks consistent
- File
- 19570929.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 24 | 16 | 21E | ||||
| 2 | D – 18 | 29 | 45E | ||||
| 3 | A – 1 | 8 | 42E | ||||
| 4 | D – 3 | -14 | 47E | ||||
| 5 | H – 1 | -23 | 64E | ||||
| 6 | A – 1 | -15 | 4W | ||||
| 7 | C – 22 | -23 | 8W | ||||
| 8 | A – 1 | -14 | 62W | ||||
| 9 | E – 51 | 15 | 28W | ||||
| 10 | H – 2 | 20 | 25W | ||||
| 11 | C – 15 | 23 | 20W | ||||
| 12 | B – 11 | 11 | 3W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.