Daily Sunspot Evaluation
Observation Sheet Wednesday, 28 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)
- 17
- Relative number (R)
- 47
- Observer
- GA
- Reading
- all checks consistent
- File
- 19771228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 9 | 21 | 29E | 239 | 28E | ||
| 2 | H – 7 | -17 | 65E | 203 | 64E | ||
| 3 | J – 1 | 21 | 60W | 328 | 61W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.