Daily Sunspot Evaluation
Observation Sheet Thursday, 12 September 1963
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)
- 3
- Number of spots (f)
- 16
- Relative number (R)
- 46
- Observer
- KA
- Reading
- all checks consistent
- File
- 19630912.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 6 | 40E | ||||
| 2 | D – 12 | -9 | 65E | ||||
| 3 | A – 2 | -5 | 40E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.