Daily Sunspot Evaluation
Observation Sheet Thursday, 11 September 1980
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)
- 11
- Number of spots (f)
- 75
- Relative number (R)
- 185
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19800911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 4 | 23 | 78W | 266 | 81W | 7 | |
| 2 | BRO – 2 | 20 | 60W | 248 | 63W | 4 | |
| 3 | HAX – 2 | 26 | 45W | 233 | 48W | 1.5 | |
| 4 | HAX – 3 | 13 | 42W | 230 | 45W | 4.5 | |
| 5 | BKI – 21 | 8 | 14E | 174 | 11E | 5.5 | |
| 6 | AKK – 1 | 19 | 38E | 150 | 35E | - | |
| 7 | EKC – 26 | 13 | 43E | 145 | 40E | 13 | |
| 8 | BKI – 8 | -11 | 56W | 244 | 59W | 5 | |
| 9 | BXI – 6 | -9 | 42E | 146 | 39E | 2.5 | |
| 10 | HAX – 1 | -9 | 70E | 118 | 67E | 2 | |
| 11 | HAX – 1 | -12 | 76E | 112 | 73E | 1.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.