Daily Sunspot Evaluation
Observation Sheet Sunday, 12 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)
- 11
- Number of spots (f)
- 89
- Relative number (R)
- 199
- Observer
- SG
- Reading
- all checks consistent
- File
- 19590412.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 8 | 1 | 6E | ||||
| 2 | E – 19 | 26 | 35E | ||||
| 3 | E – 11 | 9 | 18E | ||||
| 4 | H – 2 | 18 | 65E | ||||
| 5 | ? – 1 | 12 | 74E | ||||
| 6 | C – 6 | -12 | 43E | ||||
| 7 | D – 16 | -16 | 24E | ||||
| 8 | E – 10 | -22 | 32W | ||||
| 9 | E – 11 | 12 | 23W | ||||
| 10 | J – 3 | 26 | 38W | ||||
| 11 | J – 2 | 22 | 17W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.