Daily Sunspot Evaluation
Observation Sheet Sunday, 7 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)
- 41
- Relative number (R)
- 81
- Observer
- GT
- Reading
- all checks consistent
- File
- 19810607.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BAF – 6 | 24 | 33W | 272 | 35W | 4 | |
| 2 | BXO – 7 | 13 | 35E | 204 | 33E | 6 | |
| 3 | HAX – 3 | 12 | 64E | 175 | 62E | 3 | |
| 4 | DAF – 25 | -8 | 15E | 224 | 13E | 8 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.