Daily Sunspot Evaluation
Observation Sheet Monday, 13 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)
- 88
- Relative number (R)
- 168
- Observer
- KA
- Reading
- all checks consistent
- File
- 19570513.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 21 | 32E | ||||
| 2 | J – 2 | 20 | 42E | ||||
| 3 | D – 14 | -11 | 54E | ||||
| 4 | C – 4 | -13 | 76E | ||||
| 5 | D – 6 | -17 | 61E | ||||
| 6 | F – 21 | -28 | 29W | ||||
| 7 | C – 6 | -17 | 57W | ||||
| 8 | F – 34 | 12 | 24W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.