Daily Sunspot Evaluation
Observation Sheet Friday, 13 May 1960
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)
- 46
- Relative number (R)
- 136
- Observer
- FY
- Reading
- all checks consistent
- File
- 19600513.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 5 | 15 | 20E | ||||
| 2 | C – 7 | 17 | 47E | ||||
| 3 | H – 5 | 6 | 61E | ||||
| 4 | ? – 2 | -13 | 83E | ||||
| 5 | C – 5 | -10 | 4E | ||||
| 6 | B – 5 | -9 | 18W | ||||
| 7 | B – 5 | -16 | 65W | ||||
| 8 | A – 1 | 10 | 34W | ||||
| 9 | F – 11 | 30 | 73W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.