Daily Sunspot Evaluation
Observation Sheet Sunday, 9 September 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)
- 7
- Number of spots (f)
- 53
- Relative number (R)
- 123
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730909.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 32 | -11 | 14W | 137 | 166 | ||
| 2 | A – 1 | -19 | 34W | 157 | 165 | ||
| 3 | D – 10 | -9 | 28W | 151 | 168 | ||
| 4 | A – 1 | -16 | 40W | 163 | 162 | ||
| 5 | H – 4 | -14 | 70W | 193 | 157 | ||
| 6 | H – 4 | 14 | 42W | 165 | 159 | ||
| 7 | H – 1 | 22 | 79W | 202 | 163 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.