Daily Sunspot Evaluation
Observation Sheet Wednesday, 20 May 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)
- 79
- Relative number (R)
- 209
- Observer
- AB
- Reading
- all checks consistent
- File
- 19590520.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 4 | 23 | 6E | ||||
| 2 | C – 24 | 17 | 9E | ||||
| 3 | E – 16 | 21 | 37E | ||||
| 4 | J – 1 | 11 | 70E | ||||
| 5 | ? – 1 | 2 | 83E | ||||
| 6 | A – 2 | -9 | 5E | ||||
| 7 | A – 1 | -23 | 8E | ||||
| 8 | J – 2 | -6 | 0 | ||||
| 9 | A – 4 | -3 | 4W | ||||
| 10 | A – 1 | 8 | 73W | ||||
| 11 | A – 3 | 17 | 68W | ||||
| 12 | H – 10 | 20 | 56W | ||||
| 13 | B – 10 | 10 | 31W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.