Daily Sunspot Evaluation
Observation Sheet Thursday, 18 August 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)
- 10
- Number of spots (f)
- 182
- Relative number (R)
- 282
- Observer
- FY
- Reading
- all checks consistent
- File
- 19600818.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 12 | 16 | 17E | ||||
| 2 | D – 10 | 11 | 40E | ||||
| 3 | ? – 5 | -9 | 67E | ||||
| 4 | ? – 3 | -18 | 72E | ||||
| 5 | E – 47 | -10 | 6EE | ||||
| 6 | E – 25 | -6 | 21WE | ||||
| 7 | D – 9 | -13 | 48W | ||||
| 8 | D – 8 | 19 | 62W | ||||
| 9 | J – 1 | 21 | 77W | ||||
| 10 | F – 62 | 18 | 17W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.