Daily Sunspot Evaluation
Observation Sheet Wednesday, 22 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)
- 5
- Number of spots (f)
- 47
- Relative number (R)
- 97
- Observer
- FA
- Reading
- all checks consistent
- File
- 19711222.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 10 | -11 | 32E | 88 | |||
| 2 | H – 18 | -16 | 24E | 96 | |||
| 3 | G – 14 | -15 | 08E | 112 | |||
| 4 | J – 1 | -5 | 15W | 135 | |||
| 5 | G – 4 | 11 | 63W | 183 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.