Daily Sunspot Evaluation
Observation Sheet Saturday, 28 September 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)
- 10
- Number of spots (f)
- 78
- Relative number (R)
- 178
- Observer
- AT
- Reading
- all checks consistent
- File
- 19680928.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 16 | 12 | 0°E | 211 | |||
| 2 | H – 5 | 13 | 16°E | 196 | |||
| 3 | H – 6 | -16 | 35°E | 177 | |||
| 4 | A – 1 | -26 | 22°W | 234 | |||
| 5 | A – 1 | -16 | 46°W | 258 | |||
| 6 | C – 13 | 11 | 16°W | 228 | |||
| 7 | D – 12 | 16 | 28°W | 240 | |||
| 8 | D – 13 | 18 | 38°W | 250 | |||
| 9 | ? – 1 | 19 | 37°W | 235 | |||
| 10 | C – 10 | 17 | 14°W | 226 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.