Daily Sunspot Evaluation
Observation Sheet Wednesday, 12 May 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)
- 44
- Relative number (R)
- 94
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710512.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 5 | 5 | 09E | 189 | |||
| 2 | A – 13 | 3 | 42E | 156 | |||
| 3 | ? – 10 | 6 | 70E | 128 | |||
| 4 | E – 14 | 13 | 73W | 271 | |||
| 5 | J – 2 | 11 | 56W | 254 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.