Daily Sunspot Evaluation
Observation Sheet Sunday, 11 May 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)
- 10
- Number of spots (f)
- 46
- Relative number (R)
- 146
- Observer
- AT
- Reading
- all checks consistent
- File
- 19690511.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 7 | 8 | 23E | 104 | |||
| 2 | C – 10 | 16 | 48E | 79 | |||
| 3 | A – 1 | 18 | 65E | 62 | |||
| 4 | A – 1 | 10 | 39E | 88 | |||
| 5 | B – 7 | 13 | 59E | 68 | |||
| 6 | B – 5 | -6 | 28E | 99 | |||
| 7 | C – 4 | -10 | 47E | 80 | |||
| 8 | B – 8 | -13 | 09W | 136 | |||
| 9 | A – 2 | -18 | 44W | 171 | |||
| 10 | A – 1 | -13 | 51W | 178 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.