Daily Sunspot Evaluation
Observation Sheet Monday, 1 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)
- 12
- Relative number (R)
- 52
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810601.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 4 | 3 | 67W | 27 | 70W | 10 | |
| 2 | ARK – 1 | 5 | 03W | 323 | 06W | 0.5 | |
| 3 | HAA – 2 | 14 | 07E | 311 | 06E | 1.5 | |
| 4 | HKX – 5 | -5 | 23W | 343 | 26W | 36 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.