Daily Sunspot Evaluation
Observation Sheet Wednesday, 19 December 1990
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)
- 116
- Relative number (R)
- 176
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19901219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | FKO – 7 | 4 | 48W | 48 | 51W | 16 | E2 |
| 2 | DKC – 36 | 14 | 33W | 35 | 36W | 8 | E1,5 |
| 3 | FKI – 49 | 18 | 18W | 18 | 21W | 19 | E1,3 |
| 4 | BXI – 6 | 17 | 04W | 4 | 07W | 2.5 | 578 |
| 5 | AX – 1 | 19 | 70E | 290 | 67E | - | 579 |
| 6 | BXO – 17 | -4 | 07W | 7 | 10W | 5 | 577 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.