Daily Sunspot Evaluation
Observation Sheet Tuesday, 5 February 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)
- 9
- Number of spots (f)
- 96
- Relative number (R)
- 186
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19910205.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 6 | 20 | 30W | 117 | 32W | 2.5 | 52 |
| 2 | HA – 3 | 23 | 19W | 106 | 21W | 3 | 53 |
| 3 | HA – 1 | 14 | 60E | 27 | 58E | 2 | 51 |
| 4 | ? – 3 | 14 | 82E | 5 | 80E | 8 | 61 |
| 5 | FKC – 62 | -12 | 54W | 141 | 56W | 18.5 | 48 |
| 6 | DSO – 2 | -16 | 35W | 122 | 37W | 7.5 | 56 |
| 7 | AX – 1 | -10 | 32W | 119 | 34W | - | 62 |
| 8 | FAO – 15 | -10 | 23E | 64 | 21E | 12.5 | 57 |
| 9 | DAO – 3 | -22 | 36E | 51 | 34E | 2.5 | 58 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.