Daily Sunspot Evaluation
Observation Sheet Friday, 9 May 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)
- 11
- Number of spots (f)
- 78
- Relative number (R)
- 188
- Observer
- ET
- Reading
- all checks consistent
- File
- 19580509.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 14 | 8 | 3E | ||||
| 2 | C – 7 | 13 | 15E | ||||
| 3 | B – 2 | 19 | 13E | ||||
| 4 | A – 3 | -4 | 49E | ||||
| 5 | C – 5 | -7 | 63E | ||||
| 6 | ? – 10 | -16 | 77E | ||||
| 7 | ? – 1 | -15 | 82W | ||||
| 8 | D – 13 | 2 | 37W | ||||
| 9 | J – 1 | 11 | 31W | ||||
| 10 | B – 16 | 23 | 40W | ||||
| 11 | G – 6 | 26 | 23W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.