Daily Sunspot Evaluation
Observation Sheet Tuesday, 7 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)
- 91
- Relative number (R)
- 171
- Observer
- KA
- Reading
- all checks consistent
- File
- 19570507.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 14 | 9E | ||||
| 2 | E – 46 | 13 | 53E | ||||
| 3 | A – 1 | 2 | 50E | ||||
| 4 | A – 1 | -18 | 32E | ||||
| 5 | E – 28 | -27 | 44E | ||||
| 6 | B – 8 | -15 | 13E | ||||
| 7 | D – 5 | -24 | 48W | ||||
| 8 | J – 1 | 27 | 64W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.