Daily Sunspot Evaluation
Observation Sheet Friday, 17 May 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)
- 8
- Number of spots (f)
- 48
- Relative number (R)
- 128
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19680517.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 21 | 77E | 108 | |||
| 2 | ? – 1 | 14 | 76E | 109 | |||
| 3 | ? – 2 | -16 | 78E | 107 | |||
| 4 | E – 6 | -31 | 49E | 136 | |||
| 5 | D – 13 | -29 | 18E | 167 | |||
| 6 | A – 1 | 13 | 43W | 227 | |||
| 7 | D – 21 | 18 | 28W | 212 | |||
| 8 | J – 3 | 25 | 58W | 243 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.