Daily Sunspot Evaluation
Observation Sheet Tuesday, 25 April 1989
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)
- 9
- Number of spots (f)
- 73
- Relative number (R)
- 163
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19890425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 12 | 80W | 121 | 83W | - | 190 |
| 2 | CAO – 8 | 18 | 43W | 84 | 46W | 7.5 | 193 |
| 3 | HA – 8 | 33 | 02E | 39 | 01W | 3 | 196 |
| 4 | CAO – 4 | 13 | 66E | 335 | 63E | 11 | 197 |
| 5 | ? – 1 | -10 | 81W | 122 | 84W | - | 198 |
| 6 | DKI – 26 | -21 | 23W | 64 | 26W | 10 | 199 |
| 7 | AX – 2 | -13 | 21W | 62 | 24W | 2 | 199 |
| 8 | EAI – 19 | -19 | 08E | 33 | 05E | 14 | 199 |
| 9 | ? – 3 | -18 | 80E | 321 | 77E | 4.5 | 200 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.