Daily Sunspot Evaluation
Observation Sheet Thursday, 28 December 1978
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)
- 11
- Number of spots (f)
- 72
- Relative number (R)
- 182
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19781228.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 15 | 12 | 04E | 125 | 04E | 13 | |
| 2 | G – 19 | -14 | 37E | 92 | 37E | 10 | |
| 3 | C – 7 | -21 | 51E | 78 | 51E | 8 | |
| 4 | ? – 2 | -33 | 82E | 47 | 82E | 2 | |
| 5 | D – 7 | -30 | 54E | 75 | 54E | 9 | |
| 6 | A – 5 | -27 | 36E | 93 | 36E | 11 | |
| 7 | D – 10 | -29 | 30E | 99 | 30E | ||
| 8 | A – 1 | -25 | 58W | 187 | 58W | ||
| 9 | J – 3 | -22 | 60W | 189 | 60W | ||
| 10 | A – 1 | 11 | 42W | 171 | 42W | ||
| 11 | J – 2 | 18 | 52W | 181 | 52W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.