Daily Sunspot Evaluation
Observation Sheet Thursday, 4 May 1961
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)
- 4
- Number of spots (f)
- 35
- Relative number (R)
- 75
- Observer
- KA
- Reading
- all checks consistent
- File
- 19610504.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | -11 | 50W | ||||
| 2 | A – 1 | -6 | 53W | ||||
| 3 | C – 28 | 4 | 54W | ||||
| 4 | A – 3 | 12 | 18W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.