Daily Sunspot Evaluation
Observation Sheet Wednesday, 7 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)
- 9
- Number of spots (f)
- 53
- Relative number (R)
- 143
- Observer
- SG
- Reading
- all checks consistent
- File
- 19600907.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 6 | 15 | 2E | ||||
| 2 | A – 2 | 18 | 13E | ||||
| 3 | H – 17 | 18 | 27E | ||||
| 4 | ? – 1 | 15 | 75E | ||||
| 5 | B – 9 | 6 | 45E | ||||
| 6 | J – 1 | -16 | 64E | ||||
| 7 | B – 10 | -8 | 38E | ||||
| 8 | H – 2 | -15 | 46E | ||||
| 9 | B – 5 | -5 | 10E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.