Daily Sunspot Evaluation
Observation Sheet Thursday, 15 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)
- 7
- Number of spots (f)
- 58
- Relative number (R)
- 128
- Observer
- FY
- Reading
- all checks consistent
- File
- 19580515.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 5 | -7 | 56E | ||||
| 2 | J – 1 | -23 | 41E | ||||
| 3 | E – 45 | -19 | 2E | ||||
| 4 | J – 3 | -6 | 23W | ||||
| 5 | A – 2 | -7 | 66W | ||||
| 6 | J – 1 | 7 | 77W | ||||
| 7 | J – 1 | 14 | 68W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.