Daily Sunspot Evaluation
Observation Sheet Monday, 11 September 1972
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)
- 26
- Relative number (R)
- 96
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -10 | 75E | 159 | |||
| 2 | A – 4 | -10 | 48E | 186 | |||
| 3 | D – 7 | -13 | 50E | 184 | |||
| 4 | A – 4 | -20 | 06W | 240 | |||
| 5 | A – 1 | 10 | 69W | 303 | |||
| 6 | A – 1 | 15 | 05W | 239 | |||
| 7 | C – 8 | 20 | 06W | 240 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.