Daily Sunspot Evaluation
Observation Sheet Sunday, 16 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)
- 102
- Relative number (R)
- 182
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19890416.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AR – 2 | 36 | 64W | 224 | 66W | - | 152 |
| 2 | BRI – 16 | 15 | 45W | 205 | 47W | 6 | 145 |
| 3 | HS – 2 | 15 | 19E | 139 | 175 | 2.6 | 131 |
| 4 | AX – 1 | 21 | 22E | 138 | 20E | - | 128 |
| 5 | FKI – 31 | 9 | 35E | 125 | 33E | 16 | 123 |
| 6 | EKI – 44 | -21 | 00 | 160 | 02W | 14.5 | 119 |
| 7 | AX – 1 | -10 | 40E | 120 | 38E | - | 115 |
| 8 | ? – 5 | -17 | 77E | 83 | 75E | 12 | 110 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.