Daily Sunspot Evaluation
Observation Sheet Wednesday, 10 February 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)
- 5
- Number of spots (f)
- 19
- Relative number (R)
- 69
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710210.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 18 | 22E | 297 | |||
| 2 | A – 1 | -22 | 33W | 352 | |||
| 3 | B – 7 | -22 | 51W | 10 | |||
| 4 | H – 1 | -6 | 57W | 16 | |||
| 5 | C – 9 | 14 | 15W | 334 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.