Daily Sunspot Evaluation
Observation Sheet Wednesday, 25 April 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)
- 13
- Number of spots (f)
- 86
- Relative number (R)
- 216
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19900425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DXO – 10 | 35 | 73W | 337 | 76W | 10 | 158 |
| 2 | CAI – 9 | 22 | 64W | 328 | 67W | 9 | 167 |
| 3 | AX – 1 | 11 | 09W | 273 | 12W | 0.5 | 171 |
| 4 | DKI – 20 | 15 | 02W | 266 | 05W | 7.5 | 175 |
| 5 | CAO – 3 | 27 | 18E | 246 | 15E | 3 | 176 |
| 6 | HA – 5 | 12 | 49E | 215 | 46E | 5 | 179 |
| 7 | HK – 7 | -13 | 69W | 333 | 72W | 6 | 161 |
| 8 | CAO – 3 | -14 | 57W | 321 | 60W | 7 | 172 |
| 9 | HA – 9 | -19 | 48W | 312 | 51W | 2 | 170 |
| 10 | AX – 1 | -42 | 42W | 306 | 45W | - | 181 |
| 11 | AX – 1 | -20 | 02E | 262 | 01W | - | 182 |
| 12 | BRO – 4 | -9 | 10E | 254 | 07E | 8.5 | 174 |
| 13 | CAI – 13 | -5 | 53E | 211 | 50E | 10 | 180 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.