Daily Sunspot Evaluation
Observation Sheet Thursday, 30 April 1959
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)
- 90
- Relative number (R)
- 180
- Observer
- FY
- Reading
- all checks consistent
- File
- 19590430.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 16 | 16 | 11E | ||||
| 2 | J – 2 | -6 | 59E | ||||
| 3 | E – 26 | -7 | 13E | ||||
| 4 | J – 8 | 8 | 60W | ||||
| 5 | J – 3 | 23 | 58W | ||||
| 6 | H – 3 | 11 | 27W | ||||
| 7 | A – 1 | 10 | 19W | ||||
| 8 | E – 28 | 12 | 10W | ||||
| 9 | A – 3 | 29 | 7W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.