Daily Sunspot Evaluation
Observation Sheet Monday, 9 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)
- 49
- Relative number (R)
- 89
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710809.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 24 | -11 | 10E | 91 | |||
| 2 | H – 4 | -9 | 02E | 99 | |||
| 3 | B – 10 | 11 | 49W | 150 | |||
| 4 | D – 11 | 12 | 21W | 122 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.