Daily Sunspot Evaluation
Observation Sheet Tuesday, 11 March 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)
- 42
- Relative number (R)
- 132
- Observer
- FY
- Reading
- all checks consistent
- File
- 19690311.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | 19 | 02E | 210 | |||
| 2 | C – 6 | 30 | 32E | 180 | |||
| 3 | J – 1 | 8 | 12E | 200 | |||
| 4 | J – 4 | -10 | 38E | 174 | |||
| 5 | A – 1 | -11 | 48E | 164 | |||
| 6 | ? – 3 | -16 | 84E | 128 | |||
| 7 | A – 1 | 9 | 73W | 285 | |||
| 8 | D – 13 | 13 | 59W | 271 | |||
| 9 | B – 10 | 13 | 48W | 260 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.