Daily Sunspot Evaluation
Observation Sheet Saturday, 1 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)
- 16
- Relative number (R)
- 66
- Observer
- DK
- Reading
- all checks consistent
- File
- 19710501.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 6 | 19 | 23E | 321 | |||
| 2 | A – 2 | -14 | 46E | 298 | |||
| 3 | H – 2 | -6 | 02W | 346 | |||
| 4 | A – 1 | -11 | 58W | 42 | |||
| 5 | G – 5 | 6 | 46W | 30 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.