Daily Sunspot Evaluation
Observation Sheet Wednesday, 28 June 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)
- 23
- Relative number (R)
- 53
- Observer
- SK
- Reading
- all checks consistent
- File
- 19610628.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 16 | 12 | 4E | ||||
| 2 | D – 5 | -14 | 52E | ||||
| 3 | J – 2 | 13 | 54W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.