Daily Sunspot Evaluation
Observation Sheet Sunday, 18 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)
- 71
- Relative number (R)
- 151
- Observer
- FY
- Reading
- all checks consistent
- File
- 19580518.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 18 | 40 | 34E | ||||
| 2 | J – 2 | 22 | 67E | ||||
| 3 | A – 1 | 9 | 54E | ||||
| 4 | D – 8 | -6 | 15E | ||||
| 5 | H – 3 | -24 | 4E | ||||
| 6 | E – 32 | -18 | 37W | ||||
| 7 | A – 1 | -6 | 65W | ||||
| 8 | B – 6 | 18 | 25W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.