Daily Sunspot Evaluation
Observation Sheet Monday, 30 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)
- 13
- Number of spots (f)
- 116
- Relative number (R)
- 246
- Observer
- MH
- Reading
- all checks consistent
- File
- 19570930.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 22 | 17 | 6E | ||||
| 2 | D – 13 | 29 | 31E | ||||
| 3 | B – 8 | 20 | 19E | ||||
| 4 | ? – 1 | 42 | 72E | ||||
| 5 | ? – 1 | -5 | 70E | ||||
| 6 | ? – 3 | -13 | 72E | ||||
| 7 | H – 3 | -23 | 52E | ||||
| 8 | D – 5 | -14 | 32E | ||||
| 9 | C – 13 | -26 | 22W | ||||
| 10 | B – 13 | 10 | 25W | ||||
| 11 | F – 22 | 14 | 41W | ||||
| 12 | H – 4 | 19 | 38W | ||||
| 13 | C – 8 | 23 | 34W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.