Daily Sunspot Evaluation
Observation Sheet Sunday, 13 October 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)
- 52
- Relative number (R)
- 92
- Observer
- AT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19681013.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 29 | 13 | 62E | 313 | |||
| 2 | A – 2 | -20 | 29E | 346 | |||
| 3 | C – 18 | -12 | 05E | 10 | |||
| 4 | ? – 3 | -11 | 7.5W | 90 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.