Daily Sunspot Evaluation
Observation Sheet Tuesday, 10 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)
- 6
- Number of spots (f)
- 45
- Relative number (R)
- 105
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710810.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 20 | 48E | 40 | |||
| 2 | B – 8 | -12 | 11E | 77 | |||
| 3 | D – 19 | -12 | 05W | 93 | |||
| 4 | H – 4 | -9 | 11W | 99 | |||
| 5 | B – 2 | 10 | 63W | 151 | |||
| 6 | D – 11 | 12 | 35W | 123 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.