Daily Sunspot Evaluation
Observation Sheet Monday, 19 September 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)
- 50
- Relative number (R)
- 90
- Observer
- SK
- Reading
- all checks consistent
- File
- 19660919.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 20 | 7 | 4E | 256 | E | ||
| 2 | E – 28 | 21 | 30E | 230 | E | ||
| 3 | A – 1 | 7 | 50W | 310 | |||
| 4 | ? – 1 | 20 | 90W | 350 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.