Daily Sunspot Evaluation
Observation Sheet Monday, 13 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)
- 13
- Number of spots (f)
- 143
- Relative number (R)
- 273
- Observer
- KA
- Reading
- all checks consistent
- File
- 19590413.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 16 | 9 | 5E | ||||
| 2 | F – 39 | 26 | 24E | ||||
| 3 | H – 1 | 17 | 51E | ||||
| 4 | H – 2 | 11 | 59E | ||||
| 5 | C – 7 | -11 | 28E | ||||
| 6 | A – 1 | -20 | 28E | ||||
| 7 | E – 34 | -17 | 10E | ||||
| 8 | B – 3 | -22 | 2W | ||||
| 9 | D – 10 | -22 | 45W | ||||
| 10 | D – 9 | 13 | 37W | ||||
| 11 | A – 2 | 26 | 51W | ||||
| 12 | C – 8 | 23 | 30W | ||||
| 13 | C – 11 | 0 | 10W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.