Daily Sunspot Evaluation
Observation Sheet Tuesday, 16 December 1969
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)
- 51
- Relative number (R)
- 141
- Observer
- SM
- Reading
- all checks consistent
- File
- 19691216.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 15 | 24E | 93 | |||
| 2 | H – 5 | 13 | 35E | 79 | |||
| 3 | J – 1 | 7 | 23E | 91 | |||
| 4 | C – 6 | 13 | 52E | 62 | |||
| 5 | A – 1 | 1 | 30E | 84 | |||
| 6 | C – 29 | -12 | 25E | 89 | |||
| 7 | B – 3 | -12 | 02E | 112 | |||
| 8 | A – 2 | -3 | 60W | 174 | |||
| 9 | ? – 1 | 18 | 79W | 193 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.