Daily Sunspot Evaluation
Observation Sheet Saturday, 23 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)
- 78
- Relative number (R)
- 118
- Observer
- MA
- Reading
- all checks consistent
- File
- 19711023.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 18 | 17 | 02E | 189 | |||
| 2 | H – 1 | -5 | 58E | 133 | |||
| 3 | B – 2 | -14 | 13W | 204 | |||
| 4 | F – 57 | 8 | 19W | 210 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.