Daily Sunspot Evaluation
Observation Sheet Wednesday, 30 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)
- 21
- Relative number (R)
- 71
- Observer
- AT
- Reading
- all checks consistent
- File
- 19690430.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | 21 | 49E | 223 | |||
| 2 | ? – 2 | 12 | 83E | 189 | |||
| 3 | B – 4 | 7 | 64W | 334 | |||
| 4 | A – 2 | 13 | 26W | 298 | |||
| 5 | H – 10 | 8 | 04W | 276 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.