Daily Sunspot Evaluation
Observation Sheet Wednesday, 23 January 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)
- 7
- Number of spots (f)
- 77
- Relative number (R)
- 147
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19910123.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 11 | 22 | 17°W | 275 | 19°W | 7.5 | 35 |
| 2 | AR – 3 | 27 | 42°E | 216 | 40°E | 3° | 43 |
| 3 | BRO – 3 | 9 | 47°E | 211 | 45°E | 8.5 | 38 |
| 4 | ? – 2 | -14 | 83°W | 341 | 85°W | 4° | 36 |
| 5 | BXO – 6 | -7 | 45°E | 213 | 43°E | 4.5 | 44 |
| 6 | FKI – 31 | -18 | 56°E | 202 | 54°E | 19° | 41 |
| 7 | ? – 21 | -10 | 64°E | 194 | 62°E | 22.5 | 42 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.