Daily Sunspot Evaluation
Observation Sheet Monday, 18 August 1958
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)
- 113
- Relative number (R)
- 273
- Observer
- SG
- Reading
- all checks consistent
- File
- 19580818.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 5 | 24 | 6E | ||||
| 2 | A – 1 | 34 | 31E | ||||
| 3 | A – 4 | 21 | 74E | ||||
| 4 | F – 36 | 18 | 47E | ||||
| 5 | B – 11 | 10 | 19E | ||||
| 6 | B – 9 | 8 | 46E | ||||
| 7 | ? – 3 | -18 | 75E | ||||
| 8 | C – 12 | -15 | 47E | ||||
| 9 | A – 6 | -15 | 9E | ||||
| 10 | H – 4 | -12 | 3E | ||||
| 11 | ? – 4 | -27 | 79W | ||||
| 12 | B – 6 | -11 | 35W | ||||
| 13 | ? – 5 | -13 | 76W | ||||
| 14 | B – 4 | -8 | 66W | ||||
| 15 | A – 1 | 15 | 38W | ||||
| 16 | A – 2 | 46 | 48W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.