Daily Sunspot Evaluation
Observation Sheet Wednesday, 7 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)
- 4
- Number of spots (f)
- 20
- Relative number (R)
- 60
- Observer
- FA
- Reading
- all checks consistent
- File
- 19771207.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 9 | -25 | 53E | 132 | 52E | ||
| 2 | G – 5 | -20 | 17W | 202 | 18W | ||
| 3 | J – 5 | 16 | 67W | 252 | 68W | ||
| 4 | A – 1 | 16 | 44W | 229 | 45W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.