Daily Sunspot Evaluation
Observation Sheet Saturday, 17 September 1988
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)
- 7
- Number of spots (f)
- 36
- Relative number (R)
- 106
- Observer
- TÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19880917.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HK – 11 | 30 | 45W | 107 | 40W | 5 | 213 |
| 2 | AX – 1 | 33 | 17E | 45 | 14E | - | 229 |
| 3 | BXI – 5 | 20 | 31E | 31 | 28E | 4 | 231 |
| 4 | BXO – 3 | -21 | 67W | 129 | 70W | 5 | 220 |
| 5 | CBE – 12 | -10 | 03W | 59 ⚠ | 00W | 7 | 223 |
| 6 | DAO – 3 | -14 | 68E | 354 | 65E | 5 | 230 |
| 7 | AX – 1 | -35 | 75E | 347 | 72E | - | 232 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.