Daily Sunspot Evaluation
Observation Sheet Tuesday, 31 December 1991
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)
- 8
- Number of spots (f)
- 114
- Relative number (R)
- 194
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19911231.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 5 | -15 | 80°W | 143 | 82°W | 10° | 688 |
| 2 | AR – 1 | -15 | 46°W | 109 | 48°W | 0.5 | 693 |
| 3 | FKC – 59 | -17 | 32°W | 95 | 34°W | 19° | 690 |
| 4 | FKC – 32 | -15 | 11°W | 79 | 13°W | 17.5 | 691 |
| 5 | HA – 2 | -4 | 06°E | 51 | 04°E | 1° | 682 |
| 6 | CAI – 12 | -11 | 55°E | 8 | 53°E | 9° | 684 |
| 7 | ? – 2 | -9 | 76°E | 341 | 74°E | 7° | 695 |
| 8 | ? – 1 | -14 | 78°E | 345 | 76°E | 1° | 696 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.