Daily Sunspot Evaluation
Observation Sheet Thursday, 4 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)
- 4
- Number of spots (f)
- 22
- Relative number (R)
- 62
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810604.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 12 | 14 | 35W | 315 | 38W | 8 | |
| 2 | HAX – 2 | -7 | 63W | 343 | 66W | 4 | |
| 3 | CAI – 7 | -7 | 57E | 223 | 54E | 5 | |
| 4 | AXX – 1 | -11 | 53E | 227 | 50E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.