Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 December 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)
- 111
- Relative number (R)
- 211
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19801217.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKI – 10 | 14 | 59W | 47 | 62W | 10 | |
| 2 | FKC – 44 | 7 | 08E | 340 | 05E | 12 | |
| 3 | EAI – 29 | 14 | 16E | 332 | 13E | 13.5 | |
| 4 | HKX – 4 | 7 | 27E | 321 | 24E | 3 | |
| 5 | HAK – 2 | 4 | 69E | 279 | 66E | 3 | |
| 6 | HAK – 1 | 10 | 70E | 278 | 67E | 1 | |
| 7 | CAI – 9 | -17 | 03W | 351 | 06W | 3.5 | |
| 8 | DAO – 7 | -9 | 18E | 330 | 15E | 9 | |
| 9 | HKX – 3 | -16 | 53E | 295 | 50E | 3 | |
| 10 | ? – 2 | -6 | 79E | 269 | 76E | ? |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.