Daily Sunspot Evaluation
Observation Sheet Saturday, 9 April 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)
- 3
- Number of spots (f)
- 30
- Relative number (R)
- 60
- Observer
- LT
- Reading
- all checks consistent
- File
- 19660409.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 26 | 70W | 326 | |||
| 2 | D – 27 | 22 | 34W | 290 | |||
| 3 | A – 2 | 31 | 56W | 312 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.