Daily Sunspot Evaluation
Observation Sheet Thursday, 18 August 1966
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)
- 4
- Number of spots (f)
- 19
- Relative number (R)
- 59
- Observer
- DK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19660818.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 29 | 03E | 320 | |||
| 2 | ? – 2 | 10 | 31E | 252 ⚠ | |||
| 3 | B – 11 | 22 | 27W | 351 | |||
| 4 | J – 3 | 35 | 41W | 375 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.