Daily Sunspot Evaluation
Observation Sheet Friday, 4 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)
- 4
- Number of spots (f)
- 13
- Relative number (R)
- 53
- Observer
- HA
- Reading
- all checks consistent
- File
- 19710604.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 9 | -2 | 35E | 219 | |||
| 2 | A – 1 | -2 | 44E | 210 | |||
| 3 | H – 2 | -5 | 55E | 199 | |||
| 4 | ? – 1 | 8 | 78W | 332 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.