Daily Sunspot Evaluation
Observation Sheet Thursday, 11 June 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)
- 5
- Number of spots (f)
- 34
- Relative number (R)
- 84
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810611.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 14 | 14 | 15E | 172 | 12E | 8 | |
| 2 | ARK – 1 | -9 | 36W | 223 | 39W | 0.5 | |
| 3 | DAO – 12 | -25 | 37E | 150 | 34E | 0.5 | |
| 4 | HAX – 4 | -23 | 55E | 132 | 52E | 4 | |
| 5 | HAX – 3 | -26 | 74E | 113 | 71E | 7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.