Daily Sunspot Evaluation
Observation Sheet Thursday, 10 December 1981
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)
- 18
- Number of spots (f)
- 95
- Relative number (R)
- 275
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19811210.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 2 | 22 | 59W | 1 | 60W | 4.5 | |
| 2 | HKX – 7 | 5 | 55W | 357 | 56W | 5 | |
| 3 | BRO – 3 | 20 | 45W | 347 | 46W | 2.5 | |
| 4 | DKC – 12 | 19 | 24W | 326 | 25W | 11 | |
| 5 | EKC – 12 | 9 | 23W | 325 | 24W | 15.5 | |
| 6 | HAX – 2 | 12 | 07W | 309 | 08W | 2 | |
| 7 | HAX – 4 | 7 | 07W | 309 | 08W | 1.5 | |
| 8 | DAC – 6 | 10 | 15E | 287 | 14E | 7.5 | |
| 9 | HSX – 1 | 18 | 20E | 282 | 19E | 2.5 | |
| 10 | BXO – 4 | 9 | 23E | 279 | 22E | 4 | |
| 11 | HSX – 2 | -17 | 28W | 330 | 29W | 1.5 | |
| 12 | DAO – 3 | -32 | 22W | 324 | 23W | 6 | |
| 13 | HAX – 6 | -18 | 17W | 319 | 18W | 2 | |
| 14 | HSX – 1 | -14 | 07W | 309 | 08W | 1.5 | |
| 15 | DSO – 9 | -8 | 15E | 287 | 14E | 6.5 | |
| 16 | DKC – 10 | -16 | 28E | 274 | 27E | 8 | |
| 17 | HSX – 1 | -21 | 34E | 268 | 33E | 1.5 | |
| 18 | CKI – 10 | -7 | 46E | 256 | 45E | 8 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.