Daily Sunspot Evaluation
Observation Sheet Saturday, 28 December 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)
- 87
- Relative number (R)
- 237
- Observer
- WG
- Reading
- all checks consistent
- File
- 19571228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 7 | 19 | 44E | ||||
| 2 | ? – 1 | 21 | 82E | ||||
| 3 | C – 5 | -10 | 33E | ||||
| 4 | A – 1 | -18 | 30E | ||||
| 5 | A – 2 | -25 | 33E | ||||
| 6 | C – 8 | -23 | 22E | ||||
| 7 | J – 2 | -2 | 2W | ||||
| 8 | C – 3 | -23 | 6W | ||||
| 9 | H – 9 | -19 | 21W | ||||
| 10 | G – 9 | -27 | 48W | ||||
| 11 | J – 1 | -16 | 43W | ||||
| 12 | J – 1 | -24 | 68W | ||||
| 13 | C – 4 | 5 | 23W | ||||
| 14 | F – 29 | 23 | 44W | ||||
| 15 | H – 5 | 14 | 11W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.