Daily Sunspot Evaluation
Observation Sheet Monday, 23 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)
- 11
- Number of spots (f)
- 94
- Relative number (R)
- 204
- Observer
- MH
- Reading
- all checks consistent
- File
- 19570923.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 26 | 61E | ||||
| 2 | C – 5 | 22 | 53E | ||||
| 3 | E – 23 | 15 | 50E | ||||
| 4 | ? – 1 | -27 | 66E | ||||
| 5 | B – 3 | -17 | 18E | ||||
| 6 | B – 2 | -10 | 7E | ||||
| 7 | D – 10 | -22 | 46W | ||||
| 8 | H – 6 | 9 | 47W | ||||
| 9 | E – 18 | 11 | 28W | ||||
| 10 | ? – 3 | 12 | 75W | ||||
| 11 | E – 22 | 23 | 51W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.