Daily Sunspot Evaluation
Observation Sheet Friday, 21 December 1979
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)
- 6
- Number of spots (f)
- 86
- Relative number (R)
- 146
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19791221.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 10 | -14 | 66E | 20 | 64E | 401 | |
| 2 | E – 53 | -17 | 13E | 73 | 11E | 399 | |
| 3 | D – 10 | -31 | 20W | 106 | 22W | 400 | |
| 4 | J – 1 | -19 | 58W | 144 | 60W | 390 | |
| 5 | D – 8 | -7 | 39W | 125 | 41W | 397 | |
| 6 | ? – 4 | 9 | 74W | 160 | 76W | 395 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.