Daily Sunspot Evaluation
Observation Sheet Thursday, 21 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)
- 6
- Number of spots (f)
- 21
- Relative number (R)
- 81
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19781221.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 3 | 11 | 06E | 215 | 06E | ||
| 2 | D – 3 | 12 | 56E | 165 | 56E | ||
| 3 | J – 2 | -25 | 40W | 261 | 40W | ||
| 4 | H – 5 | -28 | 50W | 271 | 50W | ||
| 5 | E – 7 | 18 | 69W | 290 | 69W | ||
| 6 | J – 1 | 19 | 13W | 234 | 13W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.