Daily Sunspot Evaluation
Observation Sheet Monday, 17 September 1956
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)
- 77
- Relative number (R)
- 207
- Observer
- AG
- Reading
- all checks consistent
- File
- 19560917.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 24 | 4W | ||||
| 2 | C – 5 | 26 | 24E | ||||
| 3 | J – 2 | 34 | 42E | ||||
| 4 | D – 10 | 23 | 55E | ||||
| 5 | D – 5 | 22 | 34E | ||||
| 6 | H – 2 | -22 | 48E | ||||
| 7 | D – 13 | -15 | 30E | ||||
| 8 | J – 2 | -29 | 16E | ||||
| 9 | E – 30 | -13 | 7W | ||||
| 10 | J – 2 | -23 | 21W | ||||
| 11 | ? – 3 | -24 | 23W | ||||
| 12 | ? – 1 | 16 | 28W | ||||
| 13 | A – 1 | 46 | 64W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.