Daily Sunspot Evaluation
Observation Sheet Friday, 27 September 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)
- 109
- Relative number (R)
- 229
- Observer
- MH
- Reading
- all checks consistent
- File
- 19570927.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 46 | 2E | ||||
| 2 | C – 9 | 23 | 6E | ||||
| 3 | B – 5 | 22 | 11E | ||||
| 4 | J – 1 | 23 | 21E | ||||
| 5 | ? – 3 | 28 | 70E | ||||
| 6 | D – 11 | 12 | 18E | ||||
| 7 | F – 11 | 17 | 46E | ||||
| 8 | C – 15 | -26 | 18E | ||||
| 9 | D – 7 | -13 | 39W | ||||
| 10 | ? – 1 | 10 | 84W | ||||
| 11 | E – 38 | 14 | 2W | ||||
| 12 | C – 5 | 21 | 1W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.