Daily Sunspot Evaluation
Observation Sheet Sunday, 22 February 1981
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)
- 8
- Number of spots (f)
- 54
- Relative number (R)
- 134
- Observer
- OG
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810222.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 3 | 17 | 79W | 265 | 82W | 4 | |
| 2 | DAI – 4 | 11 | 73W | 259 | 76W | 14 | |
| 3 | HSX – 1 | 15 | 54W | 240 | 57W | 25 | |
| 4 | EKC – 32 | 11 | 11W | 197 | 14W | 12 | |
| 5 | HSX – 4 | 12 | 01E | 184 | 02W | 25 | |
| 6 | ? – 4 | -6 | 77W | 263 | 80W | 15 | |
| 7 | DAO – 2 | -17 | 53W | 133 ⚠ | 50E | 4 | |
| 8 | ? – 4 | -17 | 80E | 106 | 77E | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.