Daily Sunspot Evaluation
Observation Sheet Monday, 20 December 1965
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)
- 3
- Relative number (R)
- 23
- Observer
- SB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19651220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | -11 | 15E | 250 ⚠ | |||
| 2 | ? – 2 | 19 | 29W | 344 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.