Daily Sunspot Evaluation
Observation Sheet Thursday, 9 August 1973
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)
- 19
- Relative number (R)
- 59
- Observer
- SM
- Reading
- all checks consistent
- File
- 19730809.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | -9 | 24E | 149 | 143 | ||
| 2 | G – 3 | -9 | 23W | 196 | 144 | ||
| 3 | D – 12 | 9 | 46W | 219 | 146 | ||
| 4 | A – 1 | 14 | 74W | 249 | 149 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.