Daily Sunspot Evaluation
Observation Sheet Friday, 22 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)
- 11
- Number of spots (f)
- 68
- Relative number (R)
- 178
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19891222.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HH – 2 | 14 | 47W | 144 | 49W | 3 | |
| 2 | DAI – 17 | 20 | 20W | 117 | 22W | 4.5 | |
| 3 | DAO – 5 | 18 | 04W | 101 | 06W | 4 | |
| 4 | HA – 1 | 26 | 39E | 58 | 37E | 2 | |
| 5 | HK – 11 | -6 | 05W | 102 | 07W | 4 | |
| 6 | BRO – 2 | -45 | 12E | 85 | 10E | 3.5 | |
| 7 | DAO – 13 | -9 | 44E | 53 | 42E | 6 | |
| 8 | BXI – 10 | -14 | 51E | 46 | 49E | 4.5 | |
| 9 | HK – 5 | -26 | 70E | 27 | 68E | 4 | |
| 10 | HA – 1 | -11 | 77E | 20 | 75E | 1.5 | |
| 11 | AX – 1 | -8 | 82E | 15 | 80E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.