Daily Sunspot Evaluation
Observation Sheet Wednesday, 30 January 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)
- 27
- Relative number (R)
- 117
- Observer
- ET
- Reading
- all checks consistent
- File
- 19570130.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 15 | 15 | 13E | ||||
| 2 | A – 2 | 15 | 52E | ||||
| 3 | ? – 1 | -19 | 71E | ||||
| 4 | A – 2 | -18 | 6W | ||||
| 5 | J – 1 | -20 | 15W | ||||
| 6 | ? – 2 | -15 | 83W | ||||
| 7 | J – 1 | 24 | 52W | ||||
| 8 | A – 2 | 25 | 40W | ||||
| 9 | J – 1 | 34 | 36W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.