Daily Sunspot Evaluation
Observation Sheet Friday, 19 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)
- 6
- Number of spots (f)
- 16
- Relative number (R)
- 76
- Observer
- HM
- Reading
- all checks consistent
- File
- 19880219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ARX – 1 | 39 | 20W | 347 | 20W | - | 36 |
| 2 | HHX – 2 | 22 | 02W | 329 | 02W | 5 | 31 |
| 3 | HAX – 1 | 18 | 11E | 316 | 11E | 1 | 32 |
| 4 | DAI – 6 | -9 | 64W | 31 | 64W | 6 | 35 |
| 5 | ARX – 1 | -14 | 03E | 324 | 03E | - | 33 |
| 6 | CAI – 5 | -15 | 10E | 317 | 10E | 5 | 34 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.