Daily Sunspot Evaluation
Observation Sheet Wednesday, 12 August 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)
- 12
- Number of spots (f)
- 85
- Relative number (R)
- 205
- Observer
- GT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810812.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 2 | 15 | 74W | 160 | 77W | 3.5 | |
| 2 | HHX – 4 | 11 | 40W | 126 | 43W | 4 | |
| 3 | HAX – 4 | 26 | 03W | 89 | 06W | 4 | |
| 4 | AXX – 2 | 5 | 10E | 76 | 07W | - | |
| 5 | AXX – 1 | 14 | 67E | 19 | 64E | - | |
| 6 | DSI – 13 | -24 | 60W | 146 | 63W | 9.5 | |
| 7 | FKC – 45 | -8 | 33W | 119 | 36W | 21 | |
| 8 | ARX – 1 | -12 | 02W | 88 | 05W | 0.75 | |
| 9 | AXX – 2 | -6 | 14E | 72 | 11E | - | |
| 10 | BXO – 3 | -30 | 47E | 39 | 44E | 4 | |
| 11 | BXI – 4 | -21 | 63E | 13 ⚠ | 60E | 4.5 | |
| 12 | ? – 4 | -15 | 77E | 9 | 74E | 7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.