Daily Sunspot Evaluation
Observation Sheet Sunday, 19 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)
- 10
- Number of spots (f)
- 44
- Relative number (R)
- 144
- Observer
- AB
- Reading
- all checks consistent
- File
- 19590419.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 4 | 48 | 9E | ||||
| 2 | D – 6 | 20 | 44E | ||||
| 3 | J – 2 | 22 | 68E | ||||
| 4 | A – 1 | 2 | 57E | ||||
| 5 | H – 2 | -16 | 76W | ||||
| 6 | B – 4 | -8 | 59W | ||||
| 7 | E – 8 | 27 | 70W | ||||
| 8 | H – 2 | 18 | 32W | ||||
| 9 | J – 2 | 12 | 23W | ||||
| 10 | D – 13 | 19 | 13W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.