Daily Sunspot Evaluation
Observation Sheet Wednesday, 10 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)
- 3
- Number of spots (f)
- 22
- Relative number (R)
- 52
- Observer
- OG
- Reading
- all checks consistent
- File
- 19810610.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAI – 10 | 12 | 21E | 179 | 23E | 5 | |
| 2 | CRF – 7 | -24 | 52E | 148 | 49E | 65 | |
| 3 | HAK – 5 | -23 | 68E | 132 | 65E | 7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.