Daily Sunspot Evaluation
Observation Sheet Wednesday, 20 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)
- 74
- Relative number (R)
- 154
- Observer
- HÇ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19891220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 5 | 35 | 75W | 139 ⚠ | 77W | 13 | |
| 2 | CHO – 4 | 13 | 17W | 141 | 19W | 11.5 | |
| 3 | CAI – 22 | 20 | 06E | 118 | 04E | 6 | |
| 4 | ARO – 7 | 19 | 24E | 100 | 22E | 8 | |
| 5 | HA – 1 | 25 | 65E | 59 | 63E | 2 | |
| 6 | EAI – 20 | -10 | 32W | 196 ⚠ | 74W | 12 | |
| 7 | HK – 8 | -6 | 21E | 103 | 19E | 4 | |
| 8 | ? – 7 | -10 | 75E | 49 | 73E | 11 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.