Daily Sunspot Evaluation
Observation Sheet Friday, 4 January 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)
- 87
- Relative number (R)
- 207
- Observer
- ET
- Reading
- all checks consistent
- File
- 19570104.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 10 | -14 | 55E | ||||
| 2 | C – 17 | -23 | 63E | ||||
| 3 | Y – 2 | -20 | 31E | ||||
| 4 | A – 3 | -17 | 18E | ||||
| 5 | A – 2 | -28 | 3E | ||||
| 6 | A – 1 | -21 | 28W | ||||
| 7 | A – 1 | -21 | 37W | ||||
| 8 | A – 2 | -11 | 67W | ||||
| 9 | ? – 3 | 34 | 66W | ||||
| 10 | C – 14 | 28 | 48W | ||||
| 11 | B – 4 | 25 | 41W | ||||
| 12 | F – 28 | 19 | 19W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.