Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 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)
- 4
- Number of spots (f)
- 5
- Relative number (R)
- 45
- Observer
- FL
- Reading
- all checks consistent
- File
- 19880217.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HKX – 1 | 22 | 26E | 328 | 24E | 9.5 | 31 |
| 2 | HAX – 2 | 18 | 39E | 315 | 37E | 1.5 | 32 |
| 3 | AXX – 1 | -14 | 33E | 321 | 31E | 33 | |
| 4 | HAX – 1 | -15 | 42E | 312 | 40E | 1 | 34 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.