Daily Sunspot Evaluation
Observation Sheet Friday, 20 February 1959
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)
- 8
- Number of spots (f)
- 75
- Relative number (R)
- 155
- Observer
- AK
- Reading
- all checks consistent
- File
- 19590220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 36 | 13 | 13E | ||||
| 2 | H – 1 | 10 | 20E | ||||
| 3 | H – 3 | 21 | 49E | ||||
| 4 | B – 2 | -17 | 14E | ||||
| 5 | B – 3 | -36 | 51W | ||||
| 6 | C – 13 | 7 | 49W | ||||
| 7 | C – 2 | 10 | 20W | ||||
| 8 | E – 15 | 10 | 9W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.