Daily Sunspot Evaluation
Observation Sheet Saturday, 12 April 1969
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)
- 7
- Number of spots (f)
- 45
- Relative number (R)
- 115
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19690412.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 15 | 43E | 105 | |||
| 2 | H – 3 | 11 | 61E | 87 | |||
| 3 | G – 19 | -2 | 36E | 112 | |||
| 4 | J – 1 | -15 | 87E | 61 | |||
| 5 | C – 17 | -14 | 25E | 123 | |||
| 6 | J – 1 | -18 | 39W | 187 | |||
| 7 | H – 3 | 10 | 49W | 197 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.