Daily Sunspot Evaluation
Observation Sheet Saturday, 15 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)
- 16
- Number of spots (f)
- 104
- Relative number (R)
- 264
- Observer
- FY
- Reading
- all checks consistent
- File
- 19560915.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 21 | 12E | ||||
| 2 | J – 3 | 23 | 22E | ||||
| 3 | B – 2 | 26 | 31E | ||||
| 4 | A – 2 | 20 | 24E | ||||
| 5 | J – 2 | 25 | 45E | ||||
| 6 | ? – 2 | 30 | 71E | ||||
| 7 | C – 9 | -15 | 57E | ||||
| 8 | ? – 1 | -23 | 73E | ||||
| 9 | H – 2 | -31 | 42E | ||||
| 10 | F – 43 | -19 | 17E | ||||
| 11 | H – 2 | -24 | 5E | ||||
| 12 | E – 21 | -25 | 48W | ||||
| 13 | ? – 1 | -15 | 76W | ||||
| 14 | A – 3 | 15 | 48W | ||||
| 15 | ? – 4 | 21 | 75W | ||||
| 16 | C – 6 | 45 | 34W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.