Daily Sunspot Evaluation
Observation Sheet Thursday, 15 December 1966
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)
- 7
- Number of spots (f)
- 47
- Relative number (R)
- 117
- Observer
- LT
- Reading
- all checks consistent
- File
- 19661215.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 11 | 17 | 21°E | 172 | |||
| 2 | B – 3 | 22 | 35°E | 158 | |||
| 3 | E – 12 | -23 | 54°W | 247 | |||
| 4 | H – 1 | 8 | 67°W | 260 | |||
| 5 | J – 1 | 28 | 59°W | 252 | |||
| 6 | E – 13 | 22 | 24°W | 217 | |||
| 7 | C – 6 | 15 | 11°W | 204 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.