Daily Sunspot Evaluation
Observation Sheet Wednesday, 13 July 1966
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)
- 6
- Number of spots (f)
- 21
- Relative number (R)
- 81
- Observer
- SK
- Reading
- all checks consistent
- File
- 19660713.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 26 | 77E | 2 | |||
| 2 | A – 5 | -19 | 60E | 19 | |||
| 3 | B – 4 | -32 | 29W | 108 | |||
| 4 | A – 6 | 19 | 48W | 128 | |||
| 5 | ? – 3 | 23 | 75W | 154 | |||
| 6 | ? – 1 | 29 | 85W | 164 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.