Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 February 1962
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)
- 3
- Number of spots (f)
- 9
- Relative number (R)
- 39
- Observer
- ET
- Reading
- all checks consistent
- File
- 19620220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 11 | 78E | ||||
| 2 | ? – 5 | -10 | 75E | ||||
| 3 | G – 3 | 6 | 7W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.