Daily Sunspot Evaluation
Observation Sheet Sunday, 28 January 1968
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)
- 10
- Number of spots (f)
- 112
- Relative number (R)
- 212
- Observer
- LT
- Reading
- all checks consistent
- File
- 19680128.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 22 | 0 | 196 | |||
| 2 | F – 56 | 12 | 31E | 165 | |||
| 3 | ? – 1 | 26 | 88E | 108 | |||
| 4 | D – 13 | 22 | 66E | 130 | |||
| 5 | B – 5 | 14 | 47E | 149 | |||
| 6 | ? – 5 | 12 | 80E | 116 | |||
| 7 | C – 21 | -11 | 35E | 161 | |||
| 8 | B – 3 | -29 | 5E | 191 | |||
| 9 | B – 6 | 3 | 48W | 244 | |||
| 10 | A – 1 | 8 | 32W | 228 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.