Daily Sunspot Evaluation
Observation Sheet Thursday, 2 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)
- 26
- Relative number (R)
- 116
- Observer
- WG
- Reading
- all checks consistent
- File
- 19570502.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 10 | 26 | 5E | ||||
| 2 | Z – 1 | 14 | 77E | ||||
| 3 | A – 2 | -20 | 52W | ||||
| 4 | C – 3 | -16 | 61W | ||||
| 5 | J – 2 | -12 | 28W | ||||
| 6 | J – 1 | -10 | 63W | ||||
| 7 | J – 2 | -6 | 35W | ||||
| 8 | A – 1 | -5 | 25W | ||||
| 9 | D – 4 | 18 | 48W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.