Daily Sunspot Evaluation
Observation Sheet Sunday, 2 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)
- 4
- Number of spots (f)
- 16
- Relative number (R)
- 56
- Observer
- SM
- Reading
- all checks consistent
- File
- 19710502.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 4 | 19 | 10E | 321 | |||
| 2 | ? – 1 | 12 | 78E | 253 | |||
| 3 | G – 7 | -6 | 12W | 343 | |||
| 4 | B – 4 | 6 | 60W | 31 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.