Daily Sunspot Evaluation
Observation Sheet Saturday, 15 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)
- 8
- Number of spots (f)
- 71
- Relative number (R)
- 151
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19890415.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BRO – 3 | 36 | 59W | 230 | 59W | 7 | 182 |
| 2 | BRI – 14 | 16 | 30W | 203 | 32W | 6 | 181 |
| 3 | AR – 1 | 12 | 27E | 146 | 25E | - | 183 |
| 4 | HS – 2 | 15 | 33E | 140 | 31E | 2 | 185 |
| 5 | FKI – 18 | 9 | 49E | 124 | 47E | 16 | 182 |
| 6 | BRO – 4 | -30 | 70W | 243 | 72W | 5 | 187 |
| 7 | FKC – 28 | -21 | 14E | 159 | 12E | 15 | 186 |
| 8 | ? – 1 | -16 | 85E | 88 | 83E | - | 190 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.