Daily Sunspot Evaluation
Observation Sheet Friday, 1 April 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)
- 6
- Number of spots (f)
- 57
- Relative number (R)
- 117
- Observer
- FY
- Reading
- all checks consistent
- File
- 19600401.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 2 | 18 | 53E | ||||
| 2 | C – 5 | 11 | 67E | ||||
| 3 | ? – 1 | -6 | 74E | ||||
| 4 | D – 19 | -7 | 35E | ||||
| 5 | ? – 5 | -12 | 77W | ||||
| 6 | F – 25 | 12 | 11W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.