Daily Sunspot Evaluation
Observation Sheet Monday, 9 July 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)
- 2
- Number of spots (f)
- 26
- Relative number (R)
- 46
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730709.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 11 | 1 | 26°W | 243 | 130 | ||
| 2 | H – 15 | 12 | 47°W | 290 | 127 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.