Daily Sunspot Evaluation
Observation Sheet Saturday, 17 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)
- 8
- Number of spots (f)
- 86
- Relative number (R)
- 166
- Observer
- AB
- Reading
- all checks consistent
- File
- 19580517.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 8 | 40 | 46E | ||||
| 2 | ? – 1 | 22 | 80E | ||||
| 3 | G – 5 | -6 | 28E | ||||
| 4 | H – 5 | -24 | 15E | ||||
| 5 | E – 58 | -20 | 22W | ||||
| 6 | B – 4 | -15 | 22W | ||||
| 7 | A – 1 | -6 | 50W | ||||
| 8 | A – 4 | 20 | 11W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.