Daily Sunspot Evaluation
Observation Sheet Sunday, 11 October 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)
- 10
- Number of spots (f)
- 56
- Relative number (R)
- 156
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19811011.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BRI – 3 | 18 | 60W | 73 | 62W | 4 | |
| 2 | HSX – 2 | 9 | 54W | 67 | 56W | 1.5 | |
| 3 | BXO – 3 | 18 | 04W | 17 | 06W | 3.5 | |
| 4 | HKX – 1 | 19 | 44E | 329 | 42E | 3.5 | |
| 5 | AXX – 1 | 22 | 49E | 324 | 47E | - | |
| 6 | ? – 1 | -11 | 82W | 95 | 84W | - | |
| 7 | DKC – 17 | -9 | 41W | 54 | 43W | 11 | |
| 8 | DKI – 7 | -17 | 14E | 359 | 12E | 10 | |
| 9 | FKC – 16 | -19 | 38E | 335 | 36E | 16 | |
| 10 | CAI – 5 | -21 | 56E | 317 | 54E | 6 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.