Daily Sunspot Evaluation
Observation Sheet Saturday, 16 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)
- 2
- Number of spots (f)
- 25
- Relative number (R)
- 45
- Observer
- LT
- Reading
- all checks consistent
- File
- 19660416.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 21 | 20E | 144 | |||
| 2 | D – 23 | 22 | 30E | 134 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.