Daily Sunspot Evaluation
Observation Sheet Saturday, 13 February 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)
- 7
- Number of spots (f)
- 44
- Relative number (R)
- 114
- Observer
- FY
- Reading
- all checks consistent
- File
- 19600213.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 17 | 11 | 22E | ||||
| 2 | A – 1 | 9 | 52E | ||||
| 3 | J – 1 | -24 | 18E | ||||
| 4 | A – 2 | -21 | 3W | ||||
| 5 | J – 2 | -20 | 14W | ||||
| 6 | J – 2 | 16 | 63W | ||||
| 7 | E – 19 | 22 | 19W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.