Daily Sunspot Evaluation
Observation Sheet Sunday, 17 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)
- 5
- Number of spots (f)
- 13
- Relative number (R)
- 63
- Observer
- SK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19660717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 5 | 22 | 13E | 13 | |||
| 2 | H – 4 | 27 | 24E | 2 | |||
| 3 | A – 1 | 20 | 42E | 344 | |||
| 4 | G – 2 | -22 | 69E | 317 | E | ||
| 5 | ? – 1 | 36 | 79W | 307 ⚠ | 105 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.