Daily Sunspot Evaluation
Observation Sheet Monday, 4 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)
- 8
- Number of spots (f)
- 43
- Relative number (R)
- 123
- Observer
- TA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19910204.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 2 | 20 | 18W | 119 | 21W | 2.5 | 52 |
| 2 | DAO – 3 | 23 | 05W | 106 | 08W | 4 | 53 |
| 3 | HA – 1 | 14 | 72E | 29 | 69E | 2 | 59 |
| 4 | ? – 7 | -13 | 80W | 181 | 83W | 11 | 60 |
| 5 | FKC – 23 | -12 | 41W | 142 | 44W | 16.5 | 48 |
| 6 | DAO – 2 | -15 | 22W | 123 | 25W | 7.5 | 56 |
| 7 | EAO – 3 | -10 | 36W | 65 ⚠ | 33E | 10.5 | 57 |
| 8 | DAO – 2 | -22 | 46E | 55 | 43E | 3 | 58 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.