Daily Sunspot Evaluation
Observation Sheet Saturday, 4 February 1961
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)
- 27
- Relative number (R)
- 97
- Observer
- AB
- Reading
- all checks consistent
- File
- 19610204.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 5 | 5 | 76E | ||||
| 2 | C – 8 | -8 | 28E | ||||
| 3 | A – 1 | -11 | 70E | ||||
| 4 | B – 4 | -16 | 17E | ||||
| 5 | J – 3 | 8 | 59W | ||||
| 6 | A – 1 | 13 | 59W | ||||
| 7 | C – 5 | 23 | 13W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.