Daily Sunspot Evaluation
Observation Sheet Friday, 11 June 1971
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)
- 9
- Relative number (R)
- 39
- Observer
- HA
- Reading
- all checks consistent
- File
- 19710611.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 5 | 15 | 18E | 144 | |||
| 2 | H – 3 | -9 | 38W | 200 | |||
| 3 | J – 1 | -1 | 61W | 223 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.