Daily Sunspot Evaluation
Observation Sheet Saturday, 21 June 1958
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)
- 8
- Number of spots (f)
- 78
- Relative number (R)
- 158
- Observer
- AB
- Reading
- all checks consistent
- File
- 19580621.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | 18 | 15E | ||||
| 2 | C – 7 | 21 | 23E | ||||
| 3 | C – 4 | 7 | 10E | ||||
| 4 | E – 23 | 12 | 45E | ||||
| 5 | D – 11 | -13 | 64E | ||||
| 6 | H – 7 | -26 | 30W | ||||
| 7 | B – 5 | 6 | 25W | ||||
| 8 | E – 18 | 14 | 43W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.