Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 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)
- 28
- Relative number (R)
- 88
- Observer
- AT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19690715.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 9 | 16E | 331 | |||
| 2 | C – 3 | 6 | 14E | 383 ⚠ | |||
| 3 | A – 1 | -15 | 11W | 358 | |||
| 4 | H – 4 | -15 | 33W | 20 | |||
| 5 | B – 4 | 14 | 53W | 40 | |||
| 6 | D – 15 | 19 | 21W | 8 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.