Daily Sunspot Evaluation
Observation Sheet Friday, 11 December 1970
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)
- 117
- Relative number (R)
- 227
- Observer
- MA
- Reading
- all checks consistent
- File
- 19701211.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 41 | 16 | 09E | 33 | |||
| 2 | C – 41 | 14 | 38E | 4 | |||
| 3 | A – 1 | 6 | 48E | 354 | |||
| 4 | A – 2 | 6 | 61E | 341 | |||
| 5 | A – 2 | 3 | 54E | 348 | |||
| 6 | A – 1 | 3 | 72E | 330 | |||
| 7 | A – 1 | -6 | 53E | 349 | |||
| 8 | A – 2 | -10 | 63E | 339 | |||
| 9 | C – 15 | -10 | 10W | 52 | |||
| 10 | C – 10 | -5 | 13W | 55 | |||
| 11 | J – 1 | -11 | 76W | 118 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.