Daily Sunspot Evaluation
Observation Sheet Friday, 31 January 1992
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)
- 113
- Relative number (R)
- 223
- Observer
- YK
- Reading
- all checks consistent
- File
- 19920131.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 16 | 17 | 32°W | 46 | 33°W | 10° | 50 |
| 2 | CSO – 11 | 7 | 13°W | 21 | 14°W | 17.5 | 43 |
| 3 | HA – 2 | 8 | 23°E | 351 | 22°E | 1.5 | 41 |
| 4 | HA – 1 | 9 | 59°E | 315 | 58°E | 1.5 | 47 |
| 5 | FAO – 3 | -14 | 62°W | 76 | 63°W | 16.5 | 34 |
| 6 | CRO – 8 | -10 | 27°W | 41 | 28°W | 5.5 | 49 |
| 7 | EHI – 33 | -5 | 14°W | 28 | 15°W | 14.5 | 39 |
| 8 | DAO – 15 | -10 | 06°E | 8 | 05°E | 9.5 | 42 |
| 9 | AX – 1 | -14 | 24°E | 350 | 23°E | 0.5 | 40 |
| 10 | EKC – 21 | -15 | 45°E | 329 | 44°E | 14.5 | 48 |
| 11 | DAO – 2 | -13 | 68°E | 306 | 67°E | 5° | 46 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.