Daily Sunspot Evaluation
Observation Sheet Monday, 28 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)
- 4
- Number of spots (f)
- 43
- Relative number (R)
- 83
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19690428.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 12 | 13 | 0 | 296 | |||
| 2 | H – 20 | 8 | 20E | 276 | |||
| 3 | ? – 1 | 20 | 71E | 225 | |||
| 4 | B – 10 | 11 | 42W | 338 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.