Daily Sunspot Evaluation
Observation Sheet Monday, 25 February 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)
- 10
- Number of spots (f)
- 62
- Relative number (R)
- 162
- Observer
- KA
- Reading
- all checks consistent
- File
- 19570225.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 4 | 18 | 20E | ||||
| 2 | D – 22 | 31 | 37E | ||||
| 3 | A – 1 | -7 | 65E | ||||
| 4 | A – 1 | -17 | 10W | ||||
| 5 | D – 14 | -36 | 53W | ||||
| 6 | J – 2 | -28 | 56W | ||||
| 7 | J – 5 | -23 | 82W | ||||
| 8 | J – 1 | 10 | 80W | ||||
| 9 | B – 4 | 16 | 38W | ||||
| 10 | G – 8 | 14 | 1W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.