Daily Sunspot Evaluation
Observation Sheet Wednesday, 13 August 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)
- 20
- Relative number (R)
- 70
- Observer
- SM
- Reading
- all checks consistent
- File
- 19690813.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 12 | 02E | 322 | |||
| 2 | J – 3 | 10 | 38E | 286 | |||
| 3 | B – 7 | -15 | 71E | 253 | |||
| 4 | B – 5 | -13 | 21E | 303 | |||
| 5 | G – 4 | -31 | 39W | 3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.