Daily Sunspot Evaluation
Observation Sheet Monday, 16 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)
- 88
- Relative number (R)
- 198
- Observer
- MH
- Reading
- all checks consistent
- File
- 19570916.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 24 | 24 | 37E | ||||
| 2 | E – 18 | 13 | 15E | ||||
| 3 | E – 24 | 10 | 52E | ||||
| 4 | J – 1 | -23 | 19E | ||||
| 5 | J – 1 | -42 | 31W | ||||
| 6 | J – 1 | -46 | 8W | ||||
| 7 | J – 1 | -22 | 29W | ||||
| 8 | ? – 6 | -17 | 64W | ||||
| 9 | ? – 5 | 10 | 76W | ||||
| 10 | G – 6 | 25 | 26W | ||||
| 11 | A – 1 | 40 | 5W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.