Daily Sunspot Evaluation
Observation Sheet Thursday, 12 September 1968
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)
- 8
- Number of spots (f)
- 101
- Relative number (R)
- 181
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19680912.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 9 | 7 | 45E | 20 | |||
| 2 | H – 40 | -12 | 37E | 28 | |||
| 3 | A – 4 | -11 | 54E | 11 | |||
| 4 | A – 1 | -18 | 23E | 42 | |||
| 5 | B – 10 | -12 | 09W | 74 | |||
| 6 | C – 19 | -17 | 17W | 82 | |||
| 7 | D – 16 | -20 | 27W | 92 | |||
| 8 | A – 2 | -15 | 39W | 104 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.