Daily Sunspot Evaluation
Observation Sheet Wednesday, 25 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)
- 15
- Number of spots (f)
- 107
- Relative number (R)
- 257
- Observer
- YK
- Reading
- all checks consistent
- File
- 19900725.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AR – 1 | 24 | 31W | 171 | 34W | 0.5 | 314 |
| 2 | FKI – 49 | 11 | 02W | 142 | 05W | 20 | 311 |
| 3 | CSI – 8 | 28 | 08E | 132 | 05E | 8 | 317 |
| 4 | AR – 2 | 28 | 21E | 119 | 18E | 1 | 309 |
| 5 | BXI – 8 | 11 | 49E | 91 | 46E | 11 | 322 |
| 6 | AX – 1 | -14 | 69W | 209 | 72W | 0.5 | 315 |
| 7 | BRI – 10 | -18 | 46W | 186 | 49W | 7.5 | 322 |
| 8 | EKO – 10 | -28 | 26W | 166 | 29W | 14 | 310 |
| 9 | AX – 2 | -34 | 14W | 154 | 17W | 1 | 328 |
| 10 | AX – 2 | -18 | 08E | 132 | 05E | 0.5 | 324 |
| 11 | HA – 1 | -21 | 19E | 121 | 16E | 2 | 316 |
| 12 | HA – 5 | -14 | 37E | 103 | 34E | 3 | 319 |
| 13 | BRO – 2 | -23 | 51E | 89 | 48E | 7 | 325 |
| 14 | HA – 1 | -12 | 62E | 78 | 59E | 2 | 326 |
| 15 | BXI – 5 | -20 | 70E | 70 | 67E | 7 | 329 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.