Daily Sunspot Evaluation
Observation Sheet Sunday, 21 August 1960
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)
- 9
- Number of spots (f)
- 113
- Relative number (R)
- 203
- Observer
- AB
- Reading
- all checks consistent
- File
- 19600821.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 7 | 70E | ||||
| 2 | C – 9 | -9 | 26E | ||||
| 3 | D – 12 | -18 | 33E | ||||
| 4 | E – 39 | -10 | 36W | ||||
| 5 | C – 8 | -7 | 67W | ||||
| 6 | E – 14 | 17 | 58W | ||||
| 7 | C – 20 | 15 | 27W | ||||
| 8 | B – 8 | 10 | 6W | ||||
| 9 | A – 2 | 26 | 2W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.