Daily Sunspot Evaluation
Observation Sheet Friday, 22 October 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)
- 45
- Relative number (R)
- 85
- Observer
- MA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19711022.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 9 | 17 | 14E | 188 | |||
| 2 | H – 1 | -5 | 63E | 133 ⚠ | |||
| 3 | B – 2 | -13 | 02W | 204 | |||
| 4 | F – 33 | 8 | 08W | 210 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.