Daily Sunspot Evaluation
Observation Sheet Saturday, 4 December 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)
- 4
- Number of spots (f)
- 22
- Relative number (R)
- 62
- Observer
- HM
- Reading
- all checks consistent
- File
- 19711204.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 15 | -5 | 35E | 322 | |||
| 2 | A – 2 | -14 | 65E | 292 | |||
| 3 | A – 1 | -16 | 36W | 33 | |||
| 4 | C – 4 | -13 | 38W | 35 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.