Daily Sunspot Evaluation
Observation Sheet Sunday, 16 February 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)
- 7
- Number of spots (f)
- 49
- Relative number (R)
- 119
- Observer
- AT
- Reading
- all checks consistent
- File
- 19690216.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 21 | 06E | 148 | |||
| 2 | A – 2 | 11 | 10E | 144 | |||
| 3 | A – 1 | 27 | 32E | 122 | |||
| 4 | C – 24 | -15 | 30E | 124 | |||
| 5 | A – 2 | -17 | 45E | 109 | |||
| 6 | A – 1 | 7 | 39W | 193 | |||
| 7 | D – 17 | 15 | 35W | 189 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.