Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 September 1959
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)
- 10
- Number of spots (f)
- 54
- Relative number (R)
- 154
- Observer
- ET
- Reading
- all checks consistent
- File
- 19590915.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 15 | 15 | 57E | ||||
| 2 | H – 6 | 5 | 17E | ||||
| 3 | B – 4 | -16 | 45E | ||||
| 4 | A – 1 | -4 | 4W | ||||
| 5 | A – 1 | -16 | 11W | ||||
| 6 | G – 2 | -18 | 52W | ||||
| 7 | ? – 10 | -17 | 76W | ||||
| 8 | F – 12 | 5 | 53W | ||||
| 9 | A – 2 | 12 | 48W | ||||
| 10 | ? – 1 | 28 | 80W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.