Daily Sunspot Evaluation
Observation Sheet Sunday, 6 April 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)
- 5
- Number of spots (f)
- 40
- Relative number (R)
- 90
- Observer
- AT
- Reading
- all checks consistent
- File
- 19690406.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 11 | 8 | 32E | 196 | |||
| 2 | J – 2 | -19 | 39E | 189 | |||
| 3 | F – 17 | 10 | 52W | 280 | |||
| 4 | D – 6 | 20 | 30W | 258 | |||
| 5 | B – 4 | 22 | 18W | 246 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.