Daily Sunspot Evaluation
Observation Sheet Tuesday, 9 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)
- 17
- Relative number (R)
- 67
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810609.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 2 | 25 | 61W | 274 | 64W | 0.5 | |
| 2 | HAI – 6 | 11 | 40E | 173 | 37E | 4 | |
| 3 | CAO – 5 | -9 | 11W | 224 | 14W | 6.75 | |
| 4 | ARX – 1 | -27 | 65E | 148 | 62E | 0.5 | |
| 5 | ? – 3 | -24 | 78E | 135 | 75E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.