Daily Sunspot Evaluation
Observation Sheet Tuesday, 19 December 1989
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)
- 8
- Number of spots (f)
- 71
- Relative number (R)
- 151
- Observer
- MB
- Reading
- all checks consistent
- File
- 19891219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DSO – 7 | 35 | 62W | 199 | 64W | 10 | 453 |
| 2 | AR – 1 | 28 | 08W | 145 | 10W | 0.5 | 452 |
| 3 | CSI – 13 | 14 | 04W | 141 | 06W | 11.5 | 452 |
| 4 | CAI – 12 | 21 | 18E | 119 | 16E | 8 | 452 |
| 5 | BRI – 9 | 20 | 38E | 99 | 36E | 6.5 | 452 |
| 6 | ? – 1 | 26 | 78E | 59 | 76E | 4 | 452 |
| 7 | DAI – 20 | -9 | 57W | 194 | 59W | 9.5 | 452 |
| 8 | HK – 8 | -5 | 34E | 103 | 32E | 4 | 452 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.