Daily Sunspot Evaluation
Observation Sheet Thursday, 22 February 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)
- 7
- Number of spots (f)
- 50
- Relative number (R)
- 120
- Observer
- LT
- Reading
- all checks consistent
- File
- 19680222.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 26 | 11 | 65E | 161 | |||
| 2 | ? – 9 | -26 | 78E | 148 | |||
| 3 | A – 1 | -12 | 8E | 218 | |||
| 4 | B – 9 | -30 | 19E | 207 | |||
| 5 | A – 1 | -18 | 70W | 296 | |||
| 6 | H – 3 | 26 | 54W | 280 | |||
| 7 | A – 1 | 3 | 8W | 234 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.