Daily Sunspot Evaluation
Observation Sheet Sunday, 31 August 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)
- 8
- Number of spots (f)
- 72
- Relative number (R)
- 152
- Observer
- AT
- Reading
- all checks consistent
- File
- 19690831.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 13 | 10 | 14E | 72 | |||
| 2 | D – 35 | 7 | 08E | 78 | |||
| 3 | A – 1 | 13 | 66E | 20 | |||
| 4 | A – 2 | 3 | 20E | 66 | |||
| 5 | A – 2 | 2 | 06E | 80 | |||
| 6 | A – 1 | -18 | 31E | 52 | |||
| 7 | C – 10 | -10 | 17W | 103 | |||
| 8 | G – 8 | 11 | 45W | 131 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.