Daily Sunspot Evaluation
Observation Sheet Sunday, 17 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)
- 91
- Relative number (R)
- 181
- Observer
- AÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19781217.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 21 | 41E | 234 | 39E | ||
| 2 | H – 5 | 12 | 61E | 214 | 59E | ||
| 3 | D – 8 | -22 | 21E | 254 | 19E | ||
| 4 | H – 2 | -24 | 04E | 271 | 02E | ||
| 5 | J – 1 | -21 | 78W | 353 | 80W | ||
| 6 | E – 36 | -16 | 52W | 327 | 54W | ||
| 7 | E – 8 | 20 | 66W | 341 | 68W | ||
| 8 | C – 7 | 18 | 34W | 306 | 33W | ||
| 9 | D – 23 | 19 | 15W | 280 ⚠ | 17W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.