Daily Sunspot Evaluation
Observation Sheet Sunday, 20 August 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)
- 15
- Relative number (R)
- 55
- Observer
- AK
- Reading
- all checks consistent
- File
- 19610820.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 19 | 28E | ||||
| 2 | A – 1 | 15 | 50E | ||||
| 3 | A – 6 | 7 | 13E | ||||
| 4 | C – 7 | 7 | 58W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.