Daily Sunspot Evaluation
Observation Sheet Friday, 16 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)
- 9
- Number of spots (f)
- 47
- Relative number (R)
- 137
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19880916.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 14 | 87W | 162 | 90W | - | 224 |
| 2 | HB – 14 | 31 | 30W | 105 | 33W | 5 | 213 |
| 3 | AX – 2 | 32 | 23W | 97 | 25W | 1.5 | 224 |
| 4 | AX – 2 | 24 | 22E | 52 | 20E | 1 | 228 |
| 5 | CAO – 6 | 34 | 33E | 42 | 30E | 3 | 229 |
| 6 | AX – 2 | -20 | 67W | 142 | 70W | 4 | 210 |
| 7 | AX – 2 | -20 | 51W | 126 | 54W | 2 | 220 |
| 8 | DSI – 17 | -10 | 17E | 58 | 14E | 8 | 225 |
| 9 | ? – 1 | -13 | 80E | 355 | 77E | - | 130 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.