Daily Sunspot Evaluation
Observation Sheet Thursday, 11 February 1988
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)
- 4
- Relative number (R)
- 34
- Observer
- HG
- Reading
- all checks consistent
- File
- 19880211.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 24 | |||||
| 2 | ARX – 1 | 28 | 56W | 130 | 58W | 0.75 | 25 |
| 3 | ARX – 2 | -35 | 57E | 17 | 55E | 2 | 30 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.