Daily Sunspot Evaluation
Observation Sheet Tuesday, 11 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)
- 33
- Relative number (R)
- 83
- Observer
- HA
- Reading
- all checks consistent
- File
- 19710511.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 2 | 5 | 19E | 190 | |||
| 2 | C – 12 | 3 | 52E | 157 | |||
| 3 | ? – 4 | 6 | 80E | 129 | |||
| 4 | E – 13 | 13 | 62W | 271 | |||
| 5 | J – 2 | 11 | 46W | 255 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.