Daily Sunspot Evaluation
Observation Sheet Wednesday, 15 January 1958
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)
- 18
- Number of spots (f)
- 133
- Relative number (R)
- 313
- Observer
- SG
- Reading
- all checks consistent
- File
- 19580115.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 14 | 4E | ||||
| 2 | A – 1 | 16 | 17E | ||||
| 3 | G – 14 | 12 | 24E | ||||
| 4 | C – 12 | 14 | 26E | ||||
| 5 | A – 1 | 21 | 48E | ||||
| 6 | J – 3 | 20 | 69E | ||||
| 7 | D – 10 | -7 | 11E | ||||
| 8 | B – 13 | -13 | 21E | ||||
| 9 | B – 2 | -15 | 67E | ||||
| 10 | J – 1 | -23 | 0 | ||||
| 11 | B – 8 | -24 | 21W | ||||
| 12 | A – 1 | -10 | 14W | ||||
| 13 | J – 2 | -28 | 67W | ||||
| 14 | A – 1 | -17 | 69W | ||||
| 15 | E – 32 | -15 | 51W | ||||
| 16 | C – 2 | 25 | 34W | ||||
| 17 | E – 27 | 23 | 18W | ||||
| 18 | H – 1 | 28 | 3W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.