Daily Sunspot Evaluation
Observation Sheet Friday, 16 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)
- 3
- Number of spots (f)
- 27
- Relative number (R)
- 57
- Observer
- LT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19660916.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | 21 | 12E | 228 ⚠ | |||
| 2 | H – 11 | 7 | 44E | 256 | |||
| 3 | D – 13 | 22 | 50W | 350 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.