Daily Sunspot Evaluation
Observation Sheet Wednesday, 13 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)
- 13
- Number of spots (f)
- 61
- Relative number (R)
- 191
- Observer
- HÇ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19891213.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 9 | 19 | 60W | 276 | 63W | 2 | |
| 2 | BXO – 2 | 11 | 59W | 275 | 62W | 2.5 | |
| 3 | AX – 3 | 21 | 49W | 265 | 52W | 2 | |
| 4 | BXO – 4 | 13 | 27W | 243 | 30W | 8 | |
| 5 | AX – 5 | 16 | 22W | 239 | 25W | 2 | |
| 6 | AX – 1 | 9 | 04E | 212 | 01E | - | |
| 7 | BRI – 13 | 16 | 23E | 193 | 20E | 5.5 | |
| 8 | AR – 1 | 27 | 68E | 143 ⚠ | 65E | 0.5 | |
| 9 | ? – 8 | 12 | 78E | 138 | 75E | 15 | |
| 10 | HA – 5 | -9 | 01W | 217 | 04W | 2.5 | |
| 11 | AX – 2 | -6 | 05E | 211 | 02E | - | |
| 12 | AX – 1 | -23 | 21E | 195 | 18E | - | |
| 13 | BXO – 7 | -21 | 53E | 163 | 50E | 7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.