Daily Sunspot Evaluation
Observation Sheet Saturday, 17 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)
- 12
- Number of spots (f)
- 70
- Relative number (R)
- 190
- Observer
- AT
- Reading
- all checks consistent
- File
- 19690517.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 23 | 06E | 42 | |||
| 2 | B – 4 | 19 | 04E | 44 | |||
| 3 | B – 8 | -9 | 33W | 81 | |||
| 4 | J – 1 | -5 | 58W | 106 | |||
| 5 | A – 3 | 7 | 63W | 114 | |||
| 6 | B – 3 | 11 | 66W | 114 | |||
| 7 | G – 12 | 12 | 48W | 96 | |||
| 8 | G – 9 | 12 | 53W | 101 | |||
| 9 | D – 11 | 16 | 33W | 81 | |||
| 10 | A – 9 | 13 | 25W | 73 | |||
| 11 | A – 1 | 28 | 45W | 93 | |||
| 12 | A – 8 | 18 | 21W | 69 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.