Daily Sunspot Evaluation
Observation Sheet Thursday, 26 July 1990
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)
- 12
- Number of spots (f)
- 130
- Relative number (R)
- 250
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19900726.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | FKI – 60 | 10 | 15W | 141 | 18W | 19 | 311 |
| 2 | CAI – 11 | 27 | 06W | 132 | 09W | 9 | 317 |
| 3 | AX – 2 | 27 | 06E | 120 | 03E | 1 | 323 |
| 4 | BXI – 9 | 10 | 35E | 91 | 32E | 12 | 322 |
| 5 | ? – 1 | 15 | 80E | 46 | 77E | 2 | 330 |
| 6 | EAI – 9 | -19 | 60W | 186 | 63W | 11 | 323 |
| 7 | EAO – 14 | -28 | 40W | 166 | 43W | 14 | 310 |
| 8 | HA – 2 | -22 | 06E | 120 | 03E | 2 | 316 |
| 9 | HA – 6 | -14 | 23E | 103 | 20E | 4.5 | 319 |
| 10 | AX – 1 | -23 | 40E | 86 | 37E | 0.5 | 325 |
| 11 | HA – 1 | -13 | 47E | 79 | 44E | 2.5 | 326 |
| 12 | BXI – 14 | -21 | 56E | 70 | 53E | 8 | 329 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.