Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 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)
- 5
- Number of spots (f)
- 51
- Relative number (R)
- 101
- Observer
- SG
- Reading
- all checks consistent
- File
- 19600217.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 25 | 17E | ||||
| 2 | ? – 3 | 22 | 77W | ||||
| 3 | ? – 5 | 23 | 69W | ||||
| 4 | E – 38 | 13 | 30W | ||||
| 5 | B – 3 | 5 | 1W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.