Daily Sunspot Evaluation
Observation Sheet Wednesday, 21 September 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)
- 12
- Number of spots (f)
- 77
- Relative number (R)
- 197
- Observer
- SG
- Reading
- all checks consistent
- File
- 19600921.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 28 | 66E | ||||
| 2 | C – 7 | 25 | 57E | ||||
| 3 | J – 1 | 16 | 26E | ||||
| 4 | D – 8 | 8 | 40E | ||||
| 5 | C – 5 | -2 | 52E | ||||
| 6 | D – 8 | -11 | 63E | ||||
| 7 | H – 9 | -18 | 41E | ||||
| 8 | A – 1 | -12 | 16E | ||||
| 9 | F – 24 | -20 | 3E | ||||
| 10 | J – 3 | -7 | 29W | ||||
| 11 | C – 7 | 22 | 42W | ||||
| 12 | A – 2 | 26 | 30W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.