Daily Sunspot Evaluation
Observation Sheet Sunday, 28 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)
- 3
- Number of spots (f)
- 24
- Relative number (R)
- 54
- Observer
- SK
- Reading
- all checks consistent
- File
- 19610528.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | -11 | 15W | ||||
| 2 | C – 18 | 4 | 18W | ||||
| 3 | B – 4 | 8 | 18W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.