Daily Sunspot Evaluation
Observation Sheet Tuesday, 18 August 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)
- 14
- Number of spots (f)
- 108
- Relative number (R)
- 248
- Observer
- SG
- Reading
- all checks consistent
- File
- 19590818.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 8 | 30 | 48E | ||||
| 2 | A – 1 | 10 | 7E | ||||
| 3 | J – 2 | 19 | 43E | ||||
| 4 | J – 5 | 10 | 55E | ||||
| 5 | A – 2 | 8 | 44E | ||||
| 6 | E – 36 | 8 | 23E | ||||
| 7 | ? – 3 | -10 | 75E | ||||
| 8 | A – 1 | -8 | 40E | ||||
| 9 | A – 3 | -7 | 32E | ||||
| 10 | A – 1 | -7 | 21E | ||||
| 11 | C – 5 | -6 | 55W | ||||
| 12 | ? – 3 | 16 | 83W | ||||
| 13 | E – 34 | 14 | 28W | ||||
| 14 | B – 4 | 16 | 15W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.