Daily Sunspot Evaluation
Observation Sheet Saturday, 23 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)
- 17
- Number of spots (f)
- 74
- Relative number (R)
- 244
- Observer
- HE
- Reading
- all checks consistent
- File
- 19891223.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HK – 2 | 13 | 61W | 146 | 64W | 2.5 | |
| 2 | CKI – 9 | 20 | 33W | 118 | 36W | 4.5 | |
| 3 | BRO – 3 | 18 | 18W | 103 | 21W | 3.5 | |
| 4 | HS – 1 | 25 | 27E | 58 | 24E | 2 | |
| 5 | ? – 7 | 22 | 75E | 10 | 72E | 8 | |
| 6 | BRO – 6 | -30 | 23W | 108 | 26W | 6 | |
| 7 | HK – 6 | -6 | 18W | 103 | 21W | 4 | |
| 8 | BXI – 7 | -14 | 12W | 97 | 15W | 4.5 | |
| 9 | BXO – 2 | -46 | 01W | 86 | 04W | 4.25 | |
| 10 | BXO – 3 | -23 | 03E | 82 | 00 | 4 | |
| 11 | CAO – 11 | -9 | 31E | 54 | 28E | 7 | |
| 12 | BXO – 5 | -11 | 39E | 46 | 36E | 6 | |
| 13 | DAO – 5 | -27 | 57E | 27 | 55E | 5 | |
| 14 | HA – 3 | -11 | 65E | 20 | 62E | 2 | |
| 15 | AX – 1 | -7 | 69E | 16 | 66E | - | |
| 16 | HA – 2 | -14 | 76E | 9 | 73E | 2 | |
| 17 | ? – 1 | -10 | 83E | 2 | 80E | 4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.