Daily Sunspot Evaluation
Observation Sheet Thursday, 31 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)
- 11
- Number of spots (f)
- 49
- Relative number (R)
- 159
- Observer
- TÖ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19811231.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAI – 8 | 20 | 63W | 89 | 65W | 4.5 | |
| 2 | DAI – 12 | 18 | 09W | 35 | 11W | 8.25 | |
| 3 | DAO – 6 | 24 | 37E | 347 | 37E | 9 | |
| 4 | AKK – 2 | 9 | 64E | 322 | 62E | 1 | |
| 5 | CAO – 4 | -21 | 74W | 100 | 76W | 5.5 | |
| 6 | CAO – 5 | -17 | 55W | 81 | 57W | 4 | |
| 7 | HKX – 4 | -23 | 55W | 77 ⚠ | 55W | 4 | |
| 8 | AXX – 3 | -15 | 41W | 67 | 43W | 1.5 | |
| 9 | AXX – 1 | -20 | 39W | 65 | 41W | - | |
| 10 | AXX – 2 | -11 | 01W | 27 | 03W | 1 | |
| 11 | AKK – 2 | -13 | 05E | 21 | 03E | 0.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.