Daily Sunspot Evaluation
Observation Sheet Sunday, 11 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)
- 6
- Number of spots (f)
- 15
- Relative number (R)
- 75
- Observer
- TS
- Reading
- counts consistent, some coordinates doubtful
- File
- 19880911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 2 | 32 | 32E | 10 ⚠ | 31E | 3.5 | 213 |
| 2 | AX – 3 | 30 | 40E | 99 | 39E | 2.5 | 221 |
| 3 | CSF – 4 | 14 | 43E | 96 | 42E | 2.5 | 219 |
| 4 | BRO – 2 | -26 | 41W | 108 ⚠ | 42W | 3.5 | 222 |
| 5 | HS – 2 | -21 | 6W | 145 | 7W | 1.5 | 210 |
| 6 | ? – 2 | -10 | 77E | 62 | 76E | 4 | 223 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.