Daily Sunspot Evaluation
Observation Sheet Monday, 19 December 1977
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)
- 3
- Number of spots (f)
- 12
- Relative number (R)
- 42
- Observer
- FA
- Reading
- all checks consistent
- File
- 19771219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 4 | 24 | 64E | 323 | 62E | ||
| 2 | A – 1 | -24 | 30W | 57 | 32W | ||
| 3 | A – 7 | 15 | 22W | 49 | 24W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.