Daily Sunspot Evaluation
Observation Sheet Wednesday, 18 May 1960
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)
- 8
- Number of spots (f)
- 67
- Relative number (R)
- 147
- Observer
- AB
- Reading
- all checks consistent
- File
- 19600518.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 6 | 19 | 38E | ||||
| 2 | F – 39 | -13 | 22E | ||||
| 3 | A – 1 | -20 | 25W | ||||
| 4 | J – 1 | -9 | 63W | ||||
| 5 | A – 1 | 13 | 49W | ||||
| 6 | B – 3 | 15 | 27W | ||||
| 7 | C – 8 | 16 | 14W | ||||
| 8 | C – 8 | 5 | 3W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.