Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 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)
- 7
- Number of spots (f)
- 19
- Relative number (R)
- 89
- Observer
- WG
- Reading
- all checks consistent
- File
- 19570115.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 13 | 22E | ||||
| 2 | B – 6 | -9 | 23E | ||||
| 3 | H – 5 | -27 | 43E | ||||
| 4 | A – 1 | -24 | 33E | ||||
| 5 | B – 2 | -15 | 2E | ||||
| 6 | A – 1 | -16 | 76W | ||||
| 7 | B – 3 | -12 | 64W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.