Daily Sunspot Evaluation
Observation Sheet Saturday, 18 July 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)
- 15
- Number of spots (f)
- 98
- Relative number (R)
- 248
- Observer
- AB
- Reading
- all checks consistent
- File
- 19590718.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 4 | 32 | 18E | ||||
| 2 | C – 10 | 26 | 13E | ||||
| 3 | C – 4 | 29 | 44E | ||||
| 4 | ? – 1 | 23 | 82E | ||||
| 5 | B – 2 | 16 | 23E | ||||
| 6 | H – 5 | 10 | 22E | ||||
| 7 | B – 4 | 4 | 17E | ||||
| 8 | J – 1 | 9 | 44E | ||||
| 9 | ? – 1 | -13 | 88W | ||||
| 10 | A – 1 | -5 | 54W | ||||
| 11 | C – 11 | 5 | 28W | ||||
| 12 | C – 7 | 10 | 8W | ||||
| 13 | F – 34 | 17 | 49W | ||||
| 14 | C – 7 | 20 | 62W | ||||
| 15 | G – 6 | 20 | 10W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.