Daily Sunspot Evaluation
Observation Sheet Saturday, 20 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)
- 25
- Relative number (R)
- 85
- Observer
- HM
- Reading
- all checks consistent
- File
- 19711120.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 1 | -6 | 49E | 133 | |||
| 2 | B – 5 | -15 | 02W | 184 | |||
| 3 | H – 8 | -14 | 10W | 192 | |||
| 4 | B – 8 | -14 | 16W | 198 | |||
| 5 | A – 1 | -12 | 78W | 260 | |||
| 6 | A – 2 | 5 | 43W | 225 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.