Daily Sunspot Evaluation
Observation Sheet Saturday, 4 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)
- 8
- Number of spots (f)
- 42
- Relative number (R)
- 122
- Observer
- WG
- Reading
- all checks consistent
- File
- 19570504.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 13 | 53E | ||||
| 2 | A – 1 | -16 | 72E | ||||
| 3 | J – 1 | -27 | 81E | ||||
| 4 | D – 19 | -25 | 5W | ||||
| 5 | ? – 2 | -19 | 80W | ||||
| 6 | J – 2 | -12 | 54W | ||||
| 7 | C – 4 | -6 | 55W | ||||
| 8 | C – 11 | 27 | 20W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.