Daily Sunspot Evaluation
Observation Sheet Saturday, 16 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)
- 7
- Number of spots (f)
- 32
- Relative number (R)
- 102
- Observer
- HE
- Reading
- all checks consistent
- File
- 19891216.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AR – 1 | 27 | 29E | 148 | 27E | 0.5 | |
| 2 | SKC – 18 | 12 | 36E | 141 | 34E | 13.5 | |
| 3 | HA – 7 | 20 | 55E | 122 | 53E | 3.5 | |
| 4 | AX – 1 | 19 | 77E | 100 | 75E | 0.5 | |
| 5 | AR – 1 | -9 | 43W | 220 | 45W | 0.5 | |
| 6 | AX – 3 | -37 | 46E | 131 | 44E | 4 | |
| 7 | HK – 1 | -5 | 73E | 104 | 71E | 4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.