Daily Sunspot Evaluation
Observation Sheet Monday, 9 March 1981
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)
- 64
- Relative number (R)
- 164
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810309.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 2 | 3 | 36W | 22 | 36W | 30 | |
| 2 | HAX – 1 | 11 | 23W | 9 | 23W | 2 | |
| 3 | HKX – 2 | 25 | 10E | 336 | 10E | 4 | |
| 4 | RXX – 2 | 27 | 20E | 326 | 20E | 2 | |
| 5 | ERI – 35 | 9 | 36E | 310 | 36E | 12 | |
| 6 | RXX – 1 | 11 | 48E | 298 | 48E | ||
| 7 | HAX – 2 | -12 | 70W | 56 | 70W | 325 | |
| 8 | HAX – 1 | -3 | 54W | 40 | 54W | 2 | |
| 9 | EKC – 16 | -3 | 16W | 2 | 16W | 12 | |
| 10 | DRO – 2 | -5 | 73E | 273 | 73E | 4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.