Daily Sunspot Evaluation
Observation Sheet Monday, 29 April 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)
- 15
- Number of spots (f)
- 81
- Relative number (R)
- 231
- Observer
- ET
- Reading
- all checks consistent
- File
- 19570429.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 16 | 16E | ||||
| 2 | J – 2 | 26 | 38E | ||||
| 3 | A – 1 | 27 | 51E | ||||
| 4 | A – 1 | 23 | 47E | ||||
| 5 | A – 1 | 25 | 62E | ||||
| 6 | C – 21 | -5 | 70E | ||||
| 7 | H – 5 | -11 | 73E | ||||
| 8 | A – 3 | -11 | 24E | ||||
| 9 | A – 2 | -27 | 72W | ||||
| 10 | B – 6 | -18 | 10W | ||||
| 11 | G – 17 | -16 | 20W | ||||
| 12 | B – 4 | -26 | 42W | ||||
| 13 | J – 1 | -14 | 64W | ||||
| 14 | G – 10 | -9 | 18W | ||||
| 15 | B – 5 | 27 | 48W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.