Daily Sunspot Evaluation
Observation Sheet Wednesday, 1 May 1957
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)
- 9
- Number of spots (f)
- 42
- Relative number (R)
- 132
- Observer
- FY
- Reading
- all checks consistent
- File
- 19570501.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 1 | 24 | 12 | |
| 2 | C – 6 | 27 | 22 | |
| 3 | A – 1 | 22 | 21 | |
| 4 | B – 4 | -27 | 35 | |
| 5 | H – 6 | -12 | 15 | |
| 6 | H – 7 | -16 | 43 | |
| 7 | G – 6 | -10 | 45 | |
| 8 | C – 7 | -5 | 16 | |
| 9 | B – 4 | 18 | 35 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.