Daily Sunspot Evaluation
Observation Sheet Tuesday, 26 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)
- 11
- Number of spots (f)
- 78
- Relative number (R)
- 188
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19910226.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 1 | 29 | 60W | 229 | 60W | 2 | 74 |
| 2 | AX – 1 | 11 | 22W | 191 | 22W | 73 | |
| 3 | DAO – 5 | 28 | 06W | 175 | 06W | 6.5 | 74 |
| 4 | CAO – 7 | 17 | 05W | 174 | 05W | 7 | 71 |
| 5 | DAO – 7 | 3 | 46E | 123 | 46E | 4.5 | 75 |
| 6 | HK – 4 | -17 | 58W | 227 | 58W | 4.5 | 79 |
| 7 | EKC – 20 | -21 | 26W | 195 | 26W | 14 | 84 |
| 8 | CKO – 18 | -14 | 23W | 192 | 23W | 16 | 85 |
| 9 | BXO – 2 | -12 | 04W | 173 | 04W | 4.5 | 76 |
| 10 | DAO – 7 | -7 | 12E | 157 | 12E | 8.5 | 77 |
| 11 | CAO – 6 | -11 | 20E | 149 | 20E | 7 | 78 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.