Daily Sunspot Evaluation
Observation Sheet Sunday, 22 August 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)
- 82
- Relative number (R)
- 122
- Observer
- HM
- Reading
- all checks consistent
- File
- 19710822.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 7 | -5 | 58E | 231 | |||
| 2 | F – 67 | -12 | 20E | 269 | |||
| 3 | H – 1 | 13 | 29W | 318 | |||
| 4 | C – 7 | 18 | 05W | 294 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.