Daily Sunspot Evaluation
Observation Sheet Wednesday, 10 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)
- 10
- Number of spots (f)
- 49
- Relative number (R)
- 149
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19800910.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKI – 14 | 23 | 70W | 270 | 72W | 13.5 | |
| 2 | BRO – 3 | 20 | 49W | 249 | 51W | 3.5 | |
| 3 | AAK – 1 | 7 | 41W | 241 | 43W | ||
| 4 | HJX – 1 | 26 | 33W | 233 | 35W | 2 | |
| 5 | HHX – 2 | 12 | 31W | 231 | 33W | 2.5 | |
| 6 | BXO – 11 | 8 | 26E | 174 | 24E | 5.5 | |
| 7 | ARA – 1 | 19 | 50E | 150 | 48E | 0.5 | |
| 8 | DKC – 13 | 14 | 54E | 146 | 52E | 10.5 | |
| 9 | BXO – 2 | -17 | 02E | 198 | 00 | 3 | |
| 10 | ? – 1 | -8 | 82E | 118 | 80E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.