Daily Sunspot Evaluation
Observation Sheet Thursday, 6 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)
- 7
- Number of spots (f)
- 82
- Relative number (R)
- 152
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810806.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 5 | 24 | 38W | 244 ⚠ | 82W | 11 | |
| 2 | CKI – 13 | 15 | 53W | 219 | 51W | 7 | |
| 3 | CSI – 8 | 20 | 49W | 215 | 53W | 9.5 | |
| 4 | CHI – 5 | 10 | 43E | 123 | 39E | 35 | |
| 5 | CAO – 5 | -9 | 45W | 241 ⚠ | 79W | 12 | |
| 6 | RXT – 13 | -25 | 22E | 144 | 18E | 6 | |
| 7 | FKC – 33 | -9 | 52E | 114 | 48E | 19 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.