Daily Sunspot Evaluation
Observation Sheet Monday, 7 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)
- 17
- Number of spots (f)
- 117
- Relative number (R)
- 287
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19811207.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 18 | 20W | 3 | 23W | - | |
| 2 | GSI – 7 | 3 | 13W | 356 | 16W | 4 | |
| 3 | EKG – 18 | 18 | 19E | 324 | 16E | 12 | |
| 4 | EKI – 25 | 8 | 20E | 323 | 17E | 13 | |
| 5 | GSI – 6 | 12 | 36E | 307 | 33E | 6 | |
| 6 | DAI – 15 | 6 | 41E | 302 | 38E | 11 | |
| 7 | GSI – 6 | 9 | 59E | 284 | 56E | 6.5 | |
| 8 | HSX – 1 | 17 | 62E | 281 | 59E | 2 | |
| 9 | DAI – 7 | -14 | 52W | 35 | 55W | 7.5 | |
| 10 | AXX – 3 | -20 | 25W | 8 | 28W | 2 | |
| 11 | CAI – 5 | -19 | 14E | 329 | 11E | 4.5 | |
| 12 | CKI – 12 | -20 | 27E | 316 | 24E | 7 | |
| 13 | HAX – 5 | -15 | 34E | 309 | 31E | 4 | |
| 14 | AXX – 1 | -22 | 42E | 301 | 39E | - | |
| 15 | HKX – 3 | -16 | 68E | 275 | 65E | 6 | |
| 16 | ? – 1 | -21 | 77E | 266 | 74E | - | |
| 17 | ? – 1 | -7 | 82E | 261 | 79E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.