Daily Sunspot Evaluation
Observation Sheet Friday, 8 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)
- 85
- Relative number (R)
- 215
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19891208.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | 11 | 79W | 0 | 80W | 2 | |
| 2 | CAI – 13 | 27 | 53W | 334 | 54W | 9 | |
| 3 | EAC – 18 | 13 | 49W | 330 | 50W | 10.5 | |
| 4 | HA – 1 | 19 | 25W | 306 | 26W | 3.5 | |
| 5 | AX – 1 | 17 | 16W | 297 | 17W | - | |
| 6 | DKC – 23 | 19 | 02E | 279 | 01E | 5.5 | |
| 7 | DAO – 10 | 13 | 37E | 244 | 36E | 8 | |
| 8 | HS – 1 | -16 | 58W | 339 | 59W | 1 | |
| 9 | DAO – 6 | -10 | 56W | 337 | 57W | 7.5 | |
| 10 | BXO – 4 | -15 | 33W | 314 | 34W | 2 | |
| 11 | BXO – 2 | -14 | 22E | 259 | 21E | 2 | |
| 12 | AX – 2 | -18 | 44E | 237 | 43E | - | |
| 13 | CAO – 3 | -9 | 64E | 217 | 63E | 1.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.