Daily Sunspot Evaluation
Observation Sheet Thursday, 7 September 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)
- 2
- Number of spots (f)
- 29
- Relative number (R)
- 49
- Observer
- KA
- Reading
- all checks consistent
- File
- 19610907.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 5 | 17 | 36E | ||||
| 2 | E – 24 | 13 | 44W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.