Daily Sunspot Evaluation
Observation Sheet Saturday, 17 August 1968
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)
- 108
- Relative number (R)
- 208
- Observer
- DK
- Reading
- all checks consistent
- File
- 19680817.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 32 | 17E | 31 | |||
| 2 | H – 6 | 6 | 30E | 18 | |||
| 3 | E – 29 | -12 | 35E | 13 | |||
| 4 | E – 57 | -15 | 15E | 33 | |||
| 5 | A – 1 | -25 | 20E | 28 | |||
| 6 | A – 2 | -23 | 03E | 45 | |||
| 7 | J – 1 | -18 | 09W | 57 | |||
| 8 | B – 3 | -14 | 55W | 103 | |||
| 9 | A – 1 | -5 | 40W | 88 | |||
| 10 | B – 7 | 16 | 51W | 99 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.