Daily Sunspot Evaluation
Observation Sheet Friday, 15 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)
- 3
- Number of spots (f)
- 25
- Relative number (R)
- 55
- Observer
- TY
- Reading
- counts consistent, some coordinates doubtful
- File
- 19690815.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 7 | 9 | 41E | 287 ⚠ | |||
| 2 | D – 17 | -14 | 46E | 252 | |||
| 3 | ? – 1 | -31 | 70W | 8 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.