Daily Sunspot Evaluation
Observation Sheet Thursday, 11 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)
- 6
- Number of spots (f)
- 17
- Relative number (R)
- 77
- Observer
- HM
- Reading
- all checks consistent
- File
- 19711111.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 8 | 4 | 05E | 295 | |||
| 2 | ? – 1 | 8 | 83E | 217 | |||
| 3 | A – 1 | -3 | 05E | 295 | |||
| 4 | J – 1 | -20 | 60W | 0 | |||
| 5 | H – 4 | -10 | 63W | 3 | |||
| 6 | A – 2 | 7 | 72W | 12 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.