Daily Sunspot Evaluation
Observation Sheet Saturday, 23 September 1967
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)
- 5
- Number of spots (f)
- 28
- Relative number (R)
- 78
- Observer
- SB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19670923.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 17 | -24 | 50W | 120 ⚠ | |||
| 2 | ? – 1 | -30 | 80W | 150 ⚠ | |||
| 3 | ? – 3 | 16 | 85W | 150 | |||
| 4 | A – 3 | 16 | 24W | 34 ⚠ | |||
| 5 | A – 4 | 15 | 09W | 39 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.