Daily Sunspot Evaluation
Observation Sheet Sunday, 31 January 1960
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)
- 13
- Number of spots (f)
- 117
- Relative number (R)
- 247
- Observer
- ET
- Reading
- all checks consistent
- File
- 19600131.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 13 | 21 | 27E | ||||
| 2 | G – 10 | 8 | 21E | ||||
| 3 | J – 6 | 24 | 49E | ||||
| 4 | ? – 1 | -15 | 85E | ||||
| 5 | J – 1 | -24 | 72E | ||||
| 6 | A – 4 | -19 | 35E | ||||
| 7 | F – 25 | -15 | 6E | ||||
| 8 | A – 1 | 20W | |||||
| 9 | J – 1 | 9 | 43W | ||||
| 10 | F – 38 | 7 | 27W | ||||
| 11 | A – 1 | 18 | 45W | ||||
| 12 | C – 3 | 22 | 44W | ||||
| 13 | E – 13 | 11 | 12W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.