Daily Sunspot Evaluation
Observation Sheet Friday, 7 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)
- 5
- Number of spots (f)
- 57
- Relative number (R)
- 107
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730907.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 30 | -12 | 14E | 136 | 166 | ||
| 2 | C – 11 | -17 | 11W | 161 | 162 | ||
| 3 | H – 8 | -14 | 43W | 193 | 157 | ||
| 4 | H – 3 | 14 | 15W | 165 | 159 | ||
| 5 | G – 5 | 22 | 51W | 201 | 163 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.