Daily Sunspot Evaluation
Observation Sheet Wednesday, 18 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)
- 9
- Number of spots (f)
- 45
- Relative number (R)
- 135
- Observer
- MH
- Reading
- all checks consistent
- File
- 19580618.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 11 | 16E | ||||
| 2 | G – 5 | 20 | 58E | ||||
| 3 | B – 2 | 7 | 15E | ||||
| 4 | ? – 1 | 13 | 80E | ||||
| 5 | J – 2 | 6 | 48E | ||||
| 6 | A – 1 | -15 | 70E | ||||
| 7 | G – 5 | -26 | 8E | ||||
| 8 | B – 2 | -9 | 45W | ||||
| 9 | E – 24 | 15 | 6W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.