Daily Sunspot Evaluation
Observation Sheet Tuesday, 9 July 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)
- 4
- Number of spots (f)
- 74
- Relative number (R)
- 114
- Observer
- AT
- Reading
- all checks consistent
- File
- 19680709.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 21 | 12 | 24E | 181 | |||
| 2 | F – 50 | 11 | 50E | 155 | |||
| 3 | A – 1 | -15 | 50E | 155 | |||
| 4 | J – 2 | -16 | 22E | 183 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.