Daily Sunspot Evaluation
Observation Sheet Wednesday, 28 December 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)
- 5
- Number of spots (f)
- 32
- Relative number (R)
- 82
- Observer
- SB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19661228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 8 | 20 | 7E | 14 | |||
| 2 | D – 15 | -28 | 13E | 8 | |||
| 3 | H – 1 | -25 | 1E | 20 | |||
| 4 | H – 4 | 24 | 63W | 84 | |||
| 5 | H – 4 | 29 | 5W | 76 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.