Daily Sunspot Evaluation
Observation Sheet Tuesday, 9 November 1971
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)
- 32
- Relative number (R)
- 102
- Observer
- MA
- Reading
- all checks consistent
- File
- 19711109.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 11 | 10 | 02E | 325 | |||
| 2 | A – 3 | -2 | 33E | 294 | |||
| 3 | A – 1 | -15 | 49E | 278 | |||
| 4 | A – 2 | -8 | 02E | 325 | |||
| 5 | J – 2 | -19 | 33W | 0 | |||
| 6 | H – 12 | -9 | 35W | 2 | |||
| 7 | A – 1 | 11 | 36W | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.