Daily Sunspot Evaluation
Observation Sheet Wednesday, 20 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)
- 9
- Number of spots (f)
- 38
- Relative number (R)
- 128
- Observer
- GA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19781220.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 19 | 02E | 234 | 01E | ||
| 2 | H – 5 | 11 | 21E | 215 | 20E | ||
| 3 | C – 5 | 12 | 72E | 164 | 71E | ✓ | |
| 4 | A – 1 | -22 | 08W | 244 | 09W | ✓ | |
| 5 | J – 3 | -24 | 24W | 260 | 25W | ||
| 6 | H – 4 | -27 | 34W | 270 | 35W | ||
| 7 | ? – 1 | 14 | 74W | 310 | 75W | ||
| 8 | E – 17 | 19 | 35W | 281 ⚠ | 56W | ||
| 9 | A – 1 | 18 | 66W | 302 | 67W | ✓ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.