Daily Sunspot Evaluation
Observation Sheet Thursday, 11 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)
- 12
- Number of spots (f)
- 75
- Relative number (R)
- 195
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19801211.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 25 | 64W | 128 | 64W | 1.5 | |
| 2 | ECC – 23 | 15 | 16E | 48 | 16E | 11.5 | |
| 3 | DAI – 10 | 10 | 16E | 48 | 16E | 6 | |
| 4 | DAO – 2 | 15 | 71E | 353 | 71E | 3.5 | |
| 5 | AXX – 1 | 17 | 80E | 344 | 80E | ||
| 6 | ? – 1 | 7 | 86E | 338 | 86E | ||
| 7 | HAX – 1 | -13 | 38W | 102 | 38W | 0.5 | |
| 8 | DKO – 20 | -12 | 08W | 72 | 08W | 9 | |
| 9 | DAO – 8 | -7 | 03W | 67 | 03W | 5 | |
| 10 | CAO – 4 | -17 | 21E | 43 | 21E | 3 | |
| 11 | AXX – 3 | -33 | 53E | 11 | 53E | 2 | |
| 12 | AXX – 1 | -16 | 75E | 349 | 75E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.