Daily Sunspot Evaluation
Observation Sheet Wednesday, 27 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)
- 9
- Number of spots (f)
- 48
- Relative number (R)
- 138
- Observer
- AK
- Reading
- all checks consistent
- File
- 19570227.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 22 | 32 | 14E | ||||
| 2 | ? – 2 | -11 | 84E | ||||
| 3 | C – 3 | -18 | 57E | ||||
| 4 | A – 1 | -20 | 16E | ||||
| 5 | ? – 2 | -36 | 77W | ||||
| 6 | J – 2 | -28 | 80W | ||||
| 7 | A – 2 | 16 | 63W | ||||
| 8 | D – 13 | 15 | 26W | ||||
| 9 | J – 1 | 18 | 7W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.