Daily Sunspot Evaluation
Observation Sheet Sunday, 22 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)
- 14
- Number of spots (f)
- 165
- Relative number (R)
- 305
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570922.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 25 | 76E | ||||
| 2 | ? – 4 | 21 | 68E | ||||
| 3 | E – 15 | 14 | 65E | ||||
| 4 | A – 1 | 8 | 26E | ||||
| 5 | B – 4 | -18 | 33E | ||||
| 6 | B – 5 | -10 | 21E | ||||
| 7 | C – 18 | -23 | 28W | ||||
| 8 | A – 1 | -24 | 36W | ||||
| 9 | F – 28 | 9 | 32W | ||||
| 10 | B – 4 | 11 | 21W | ||||
| 11 | E – 37 | 10 | 13W | ||||
| 12 | C – 3 | 12 | 60W | ||||
| 13 | A – 1 | 14 | 68W | ||||
| 14 | F – 42 | 22 | 38W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.