Daily Sunspot Evaluation
Observation Sheet Thursday, 19 February 1998
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)
- 2
- Number of spots (f)
- 11
- Relative number (R)
- 31
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19980219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EHC – 6 | -27 | 38W | 32 | 40W | 12 | 26 27 |
| 2 | CRO – 5 | -23 | 20W | 14 | 22W | 3 | 28 30 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.