Daily Sunspot Evaluation
Observation Sheet Monday, 21 July 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)
- 6
- Number of spots (f)
- 34
- Relative number (R)
- 94
- Observer
- MÖ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19690721.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 20 | 45E | 253 ⚠ | |||
| 2 | G – 17 | 12 | 29E | 239 | |||
| 3 | B – 8 | -16 | 34W | 302 | |||
| 4 | A – 1 | 6 | 70W | 338 | |||
| 5 | J – 3 | 11 | 66W | 334 | |||
| 6 | C – 4 | 25 | 40W | 308 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.