Daily Sunspot Evaluation
Observation Sheet Friday, 4 October 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)
- 15
- Number of spots (f)
- 110
- Relative number (R)
- 260
- Observer
- ET
- Reading
- all checks consistent
- File
- 19571004.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 42 | 22E | ||||
| 2 | A – 1 | 33 | 54E | ||||
| 3 | A – 1 | 13 | 38E | ||||
| 4 | H – 4 | -14 | 55E | ||||
| 5 | J – 1 | -5 | 16E | ||||
| 6 | E – 30 | -15 | 18E | ||||
| 7 | A – 6 | -40 | 47E | ||||
| 8 | A – 1 | -36 | 34E | ||||
| 9 | E – 27 | -23 | 3E | ||||
| 10 | A – 2 | -13 | 0 | ||||
| 11 | J – 1 | -15 | 26W | ||||
| 12 | ? – 1 | -27 | 72W | ||||
| 13 | H – 7 | 17 | 50W | ||||
| 14 | ? – 1 | 26 | 74W | ||||
| 15 | G – 24 | 28 | 23W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.